Mermaid swimwear swimming costumes rainbow colours two girls by a pool with monofins

May 25, 2025

Mermaid Swimwear: Swimsuits, Swimming Costumes and Matching Outfits

by Emma Horton in Planet Mermaid Blog

Mermaid swimwear brings a little underwater imagination to swimming pools and beach holidays. From a colourful mermaid swimsuit to coordinating tops and swimming briefs, there are different ways to create a mermaid-inspired outfit without wearing a tail.

Explore our Girls Swimsuits collection for one-piece swimming costumes, or read on to discover matching swimming separates.

This guide introduces Planet Mermaid’s existing swimming clothing and explains how ordinary swimwear differs from swimmable mermaid tails and Magic Fin monofin equipment.

Choosing a mermaid swimming costume

Start with the type of outfit your child prefers: a one-piece swimming costume, a swimming top with briefs, or a top with swimming leggings.

Check the measurements, available sizes and included items on each product page. Matching garments may be sold separately, and not every design is available in every style or size.

One-piece mermaid swimsuits

For children who prefer a one-piece swimming costume, explore our Girls Swimsuits collection.

Our existing options include the Coral Carnival Girls Swimsuit and Pacific Rainbow Girls Swimsuit. Both are described for swimming-pool and beach use.

Check each swimsuit’s measurements rather than choosing by age alone.

Mermaid swimming tops and tankinis

Swimming separates let you coordinate different garments in a favourite design.

Browse our Mermaid Bikini Tops collection for products described as tankini tops and swimming crop tops. You can also explore the dedicated Mermaid Crop Tops collection.

Some products have “bikini” in their name but are described as tops. Check what is included rather than assuming the price covers a complete two-piece outfit.

Matching mermaid swim briefs

Our Mermaid Briefs collection includes swimming bottoms that coordinate with designs across the range.

For example, the Ocean Kiss Mermaid Crop Top and Ocean Kiss Briefs offer a matching combination.

Check the fit information for both garments before ordering.

Mermaid swimming leggings

For a different swimming outfit, explore our Mermaid Leggings collection. These garments are described as suitable for use in and out of the water.

Options include Ocean Kiss Mermaid Leggings, which can be coordinated with the matching swimming top.

Swimming leggings have separate legs. They are not mermaid tails and do not hold the swimmer’s feet together.

Putting together a mermaid swimming outfit

Choose the main swimming garments first, then add coordinating accessories if wanted.

Before ordering:

Check the individual garment measurements and fit guidance.
Confirm whether the listing is for a top, bottoms or a complete outfit.
Check that coordinating pieces are available in the sizes needed.
Read the product-specific care instructions.
Distinguish swimming clothing from dress-up costumes and specialist tail equipment.

Product photographs may show matching items together, so use the description and selected options to confirm exactly what you are buying.

Mermaid swimwear versus swimmable mermaid tails

A mermaid swimming costume does not need to include a tail.

One-piece swimsuits, swimming tops, briefs and leggings are clothing for swimming. A swimmable mermaid tail encloses the legs and is used with compatible equipment for mermaid swimming.

If you are looking for that specialist experience, explore our Mermaid Tails collection and the monofin collection featuring the Magic Fin monofin.

Check the selected product’s included items and compatibility information. Do not assume every fabric tail includes a Magic Fin monofin.

An adult beside a child wearing a mermaid tail in a swimming pool

Important tail and monofin safety information

Warning: Mermaid tails or monofins can significantly reduce the person’s ability to swim and can only be used by competent swimmers under strict competent adult supervision at all times, regardless of swimming ability.

This applies to mermaid tails and Magic Fin monofin equipment. Children must always be supervised by a responsible adult during any swimming activity, and products must be used in safe, controlled environments.

Read our official Mermaid Safety guidance and its linked leaflet before use. Follow the documented equipment and Quick Release instructions, and check the swimming facility’s rules.

Our guide to swimming with a mermaid tail provides further information about this separate activity.

Find your mermaid swimwear

For a one-piece mermaid swimsuit, start with our Girls Swimsuits collection. For a coordinated swimming outfit, explore the swimming tops, briefs and leggings linked above.

Choose the style and fit that suit your child’s swimming plans, check what is included, and bring a little mermaid imagination to their next pool or beach day.

June 22, 2026

Are Monofins Safe? Everything You Need to Know Before Mermaid Swimming

Mermaid swimming has become one of the most exciting ways for children and adults to enjoy the water. Whether you are gliding through the pool in a beautiful mermaid tail or taking part in a mermaid swimming lesson, the monofin is an essential part of the experience. A common question from parents and new swimmers is: are monofins safe? The good news is that monofins are safe when used correctly, by confident swimmers, and with proper supervision. In this guide, we'll explain how monofins work, their benefits, and the important safety tips every mermaid should know. What Is a Monofin? A monofin is a swimming fin that holds both feet together inside a single fin blade. Unlike traditional swim fins, a monofin encourages a dolphin kick motion, similar to the way dolphins and mermaids move through the water. Monofins are typically worn inside a mermaid tail and provide the propulsion needed for smooth, efficient swimming. They help swimmers move gracefully while improving body control and swimming technique. Are Monofins Safe for Swimming? Yes, monofins are safe when they are used appropriately. Like any swimming equipment, safety depends on the swimmer's ability, the environment, and following the manufacturer's guidance. A well-designed monofin should fit comfortably, allow the feet to be released easily, and be used by swimmers who are confident in the water. Many swim schools and mermaid swimming instructors use monofins as part of structured lessons to help swimmers develop their technique and confidence. Why Do People Ask "Are Monofins Safe"? The question often arises because monofins keep both feet together, which can feel unusual for first-time users. Parents may worry that swimmers could struggle to move or stop quickly. While this concern is understandable, modern monofins are specifically designed to be removed quickly if needed. When swimmers learn the correct technique and practise in a controlled environment, monofins can be both safe and enjoyable to use. The key is ensuring that the swimmer is ready for mermaid swimming and understands how to use the equipment correctly. Benefits of Using a Monofin Improves Swimming Skills Many swimmers discover that using a monofin helps them develop a stronger dolphin kick. This movement engages the core muscles and encourages good body positioning in the water. Builds Confidence Learning a new swimming skill can be incredibly rewarding. As swimmers become comfortable using a monofin, they often gain confidence in their abilities and spend more time enjoying the water. Encourages Physical Activity Mermaid swimming combines exercise with imaginative play. It is a fun way to stay active while developing strength, coordination and endurance. Creates a Magical Swimming Experience Of course, one of the biggest benefits is the excitement of transforming into a mermaid. The smooth movement created by a monofin makes the experience feel more realistic and enjoyable. Monofin Safety Tips If you are wondering whether monofins are safe, following these simple safety tips can help ensure a positive experience. Only Use a Monofin if You Are a Confident Swimmer A monofin should not be used as a swimming aid. Swimmers should already be comfortable in the water and able to swim independently before trying mermaid swimming. Start in Shallow Water First-time users should practise in shallow water where they can stand up easily. This allows swimmers to become familiar with the dolphin kick motion before moving into deeper water. Use Adult Supervision Children should always be supervised by a responsible adult while using a monofin or mermaid tail. Supervision is important regardless of swimming ability. Follow Pool Rules Some swimming pools have specific policies regarding monofins and mermaid tails. Always check with the facility before swimming. Learn Proper Technique Taking a mermaid swimming lesson or receiving guidance from an experienced instructor can help swimmers learn safe techniques and build confidence more quickly. Check Equipment Before Use Before entering the water, inspect the monofin for signs of wear or damage. Ensuring that equipment is in good condition helps maintain safety and performance. Are Monofins Safe for Children? Yes, monofins can be safe for children who meet the recommended swimming requirements. Children should be confident swimmers, comfortable underwater, and able to follow instructions. Parents should choose a monofin that is appropriate for the child's size and experience level. Many children find that mermaid swimming motivates them to spend more time practising their swimming skills. When used responsibly, a monofin can become a fun and rewarding part of their swimming journey. Are Monofins Safe for Beginners? Beginners who are already confident swimmers can safely learn to use a monofin. The most important step is allowing time to practise. Most swimmers adapt quickly to the dolphin kick movement. Starting slowly and focusing on technique helps build comfort and confidence. Swimming lessons designed for mermaid swimming can also provide valuable guidance for beginners. Choosing a Quality Monofin Not all monofins are created equal. Choosing a reputable product designed specifically for recreational mermaid swimming is important. Look for features such as: Comfortable foot pockets Durable construction Easy foot release Age-appropriate sizing Compatibility with mermaid tails Quality equipment contributes to both safety and enjoyment in the water. Final Thoughts: Are Monofins Safe? So, are monofins safe? The answer is yes. Monofins are safe when used by confident swimmers, under appropriate supervision, and according to safety guidelines. They can help improve swimming technique, build confidence and create a truly magical mermaid swimming experience. Whether you are a young mermaid dreaming of your first tail or an adult looking for a unique way to enjoy swimming, a well-designed monofin can provide hours of fun in the water. At Planet Mermaid, we believe mermaid swimming should be both magical and safe. By choosing quality equipment and following sensible safety practices, swimmers of all ages can enjoy the excitement of becoming a mermaid with confidence.

Learn more

Children practising mermaid swimming with monofin tails under instructor supervision in a safe pool environment

March 16, 2026

The Complete Guide to Mermaid Swimming: How Planet Mermaid Helped Bring Real-Life Mermaids to the World

By the Founder of Planet Mermaid There is something timeless about the magic of mermaids. For centuries, stories of mysterious sea maidens have captured the imagination of children and adults alike. In the United Kingdom especially, the mythology of mermaids runs deep through coastal folklore, maritime legends, and seaside storytelling. Yet over the past two decades, something extraordinary happened: the mermaid myth stepped out of the pages of legend and into real life. Children didn’t just dream of mermaids anymore — they became them. At Planet Mermaid, we were lucky enough to witness the very beginning of this transformation. The Early Days of Mermaid Swimming Back in 2009, when Planet Mermaid first began creating mermaid tails in our studio in Bedfordshire, the idea of mermaid swimming was still something new in the UK. Children loved dressing up as mermaids, but swimming like one — gliding through the water with a beautiful tail — was almost unheard of. Our very first tails were pink. That colour felt like the perfect beginning — playful, magical, and unmistakably mermaid. When the Beach Believed Parents began calling us to tell incredible stories about children wearing our tails at the beach. One young girl swimming with her tail quickly became the centre of attention as other children gathered around her asking for photos and hugs. The Birth of Mermaid Swimming Lessons Parents began asking if their children could learn to swim like mermaids properly. So we began working with affiliated swim schools across the UK to create structured mermaid swimming sessions where children could learn the dolphin kick and gain confidence in the water. We have training hundreds of professional Swimming Instructors across the UK to date. The evolution of mermaid swim schools has evolved over the last two decades Listening to Our Mermaid Community We listened carefully to our customers and expanded from our original pink tail into a full rainbow of colours so every young mermaid could find the tail that matched their imagination. When Parents Wanted to Be Mermaids Too Mothers often told us they wished they had mermaid tails when they were young. So we began designing tails for adults as well, allowing families to enjoy the magic of mermaid swimming together. When Mermaids Became Gymnasts In 2018 we experimented with mermaid gymnastics at a local gym school. The BBC filmed the session and the footage quickly went viral with more than 7 million people watching mermaids performing gymnastics. Shortly afterwards the Olympic gymnastics training team in the United States contacted us asking if we could send mermaid tails for their athletes to try. We worked closely with the Falcon Gym Team and created a Viral sensation! 7M viewers BBC Business News and Global Attention Following the viral success we were invited onto BBC Business News to talk about the global interest in mermaid gymnastics and mermaid swimming. During the broadcast the presenter even wore one of our mermaid tails on air. Dressing Celebrities and Their Families Over the years our mermaid tails have been worn by thousands of children including the families of well‑known celebrities. One unforgettable moment was seeing Shakira wearing one of our mermaid tails in the Vogue building in London. Sending Mermaid Magic Around the World Planet Mermaid tails have travelled across the globe, helping children experience the joy of becoming a mermaid for the very first time. Guinness World Record for the Largest Gathering of Mermaids In June 2022, Planet Mermaid was proud to take part in the Guinness World Record attempt for the largest gathering of mermaids, held in Plymouth, United Kingdom. An incredible 378 mermaids came together in one location, creating a spectacular celebration of creativity, community, and the growing popularity of mermaid swimming. Events like this highlight how a childhood dream has evolved into a global movement enjoyed by swimmers of all ages. Later that year the record was surpassed by Richard Branson at the Virgin Voyages Beach Club in Bimini, where 457 mermaids gathered to set a new Guinness World Record. Seeing hundreds of people united by the magic of mermaids was a powerful reminder of how far the mermaid swimming community has grown around the world. The History of Mermaid Swimming Although mermaid legends date back centuries in folklore, modern mermaid swimming is a relatively recent activity. Early underwater mermaid performances appeared in films and aquariums during the mid‑20th century. As swim technology improved, specially designed monofins allowed swimmers to move through the water using the dolphin kick, creating the fluid movement associated with mermaids. During the early 2000s recreational mermaid swimming began to grow around the world, and companies such as Planet Mermaid helped introduce the experience to families and swim schools across the UK. What Is Mermaid Swimming? Mermaid swimming involves wearing a mermaid tail with a monofin and using a dolphin kick motion similar to the butterfly stroke. Is Mermaid Swimming Safe? When taught correctly and supervised by parents and trained instructors, mermaid swimming can be a safe and rewarding activity. Mermaid Swimming FAQ What age can children start mermaid swimming? Most swim schools recommend children are confident swimmers before using a mermaid tail. Is mermaid swimming good exercise? Yes. Mermaid swimming strengthens core muscles and improves coordination. Are mermaid tails safe? When used with supervision and proper instruction, mermaid tails can be safe and enjoyable. About the Author This article was written by the founder of Planet Mermaid, the founding UK company, introducing mermaid swimming to children across the UK since 2009.

Learn more

Two girls walking on the beach holding Magic Fin monofins after swimming, showing proper care and handling of mermaid monofins

March 16, 2026

How to Care for Your Mermaid Tail: Cleaning & Storage Tips

Mermaid tails are more than just a fun accessory. They are a significant investment for anyone who enjoys swimming like a mermaid. Proper care is essential to keep your tail looking beautiful, lasting longer, and performing safely in the water. This guide will provide clear cleaning and storage tips, helping you maintain your mermaid tail while ensuring its durability. Why Proper Mermaid Tail Care Matters Caring for your mermaid tail is important for several reasons: Longevity: Regular cleaning prevents fabric degradation and keeps colours vibrant. Hygiene: Mermaid tails come in contact with water, sweat, and chlorine, making proper cleaning essential to prevent bacteria or mildew. Safety: Damaged tails can be unsafe to swim in, especially if the monofin becomes loose or the fabric tears. By following a consistent care routine, you ensure your tail remains safe, hygienic, and visually stunning. Cleaning Your Mermaid Tail Cleaning your mermaid tail properly is the first step to long-lasting enjoyment. Different types of tails require slightly different care, so it is important to follow manufacturer instructions. 1. Rinse After Every Use After swimming in chlorinated pools, saltwater, or lakes, rinse your mermaid tail thoroughly with cold, fresh water. This helps remove chlorine, salt, and debris that can damage the fabric and fade the colours. Tip: Avoid using hot water because it may warp the monofin or weaken the tail fabric. 2. Hand Wash with Mild Detergent For deeper cleaning, fill a basin with cold water and a small amount of mild detergent or swimsuit cleaner. Gently swirl the tail in the water without scrubbing harshly. Avoid: Machine washing or using harsh chemicals, bleach, or fabric softeners as these can damage the tail. 3. Rinse Thoroughly After washing, rinse the tail multiple times in cold water to remove all soap residues. Leftover detergent can cause fabric stiffening or irritation on the skin. 4. Dry Properly Gently squeeze out excess water without wringing or twisting the tail. Lay it flat on a clean towel or hang it in a shaded area to air dry. Avoid: Direct sunlight or tumble drying because UV rays can fade colours and heat can damage the monofin. Storing Your Mermaid Tail Proper storage is just as important as cleaning. Correct storage prevents creasing, stretching, and mildew growth. 1. Ensure the Tail is Completely Dry Never store a damp tail. Moisture can cause mildew or unpleasant odors that are difficult to remove. Always ensure the tail is completely dry before putting it away. 2. Use a Tail Bag or Soft Storage Option Invest in a breathable tail bag or a soft storage container to protect your tail from dust and sharp objects. Avoid plastic bags that trap moisture. 3. Avoid Folding the Monofin If your tail has a removable monofin, store it separately or in a way that avoids bending. Twisting or folding the monofin can cause permanent damage. Water safety instructors also recommend inspecting monofins regularly to ensure they remain secure and undamaged before swimming. 4. Store Flat or Rolled If possible, store your tail flat or gently rolled. Rolling reduces creases and helps maintain the shape of the tail. 5. Keep in a Cool, Dry Place Avoid storing your tail in direct sunlight, damp areas, or near heat sources. A cool, dry cupboard or shelf is ideal for long-term storage. Additional Tips for Mermaid Tail Maintenance Maintaining your tail goes beyond cleaning and storage. Here are extra tips to extend its lifespan: Avoid Rough Surfaces: Do not drag your tail across rough pool edges, rocks, or concrete because this can cause snags or tears. Check the Monofin Regularly: Inspect for cracks or loose parts. A damaged monofin can affect swimming performance and safety. Rotate Tails: If you swim frequently, consider owning more than one tail to reduce wear and tear on a single tail. Avoid Prolonged Sun Exposure: Even when dry, excessive sunlight can fade the fabric over time. Choosing the Right Detergent and Accessories Not all detergents are suitable for mermaid tails. Look for mild, non-abrasive detergents specifically designed for swimwear. Avoid laundry powders or harsh chemical cleaners. Accessories like tail hangers or padded storage bags can also help maintain the tail’s shape while preventing damage from folding or creasing. Signs Your Mermaid Tail Needs Extra Care Watch for signs of wear that require immediate attention: Fading colours or fabric pilling Tears or holes in the fabric Loose or cracked monofin Persistent odours after washing Addressing these issues promptly can prevent further damage and keep your tail in top condition. Conclusion Planet Mermaid has worked with mermaid tails and swim schools for many years, and proper cleaning and storage is one of the most important factors in extending the life of a tail. Proper care of your mermaid tail ensures it stays beautiful, hygienic, and safe for swimming. By following these cleaning and storage tips, you can enjoy your tail for years to come. Regular rinsing, gentle washing, careful drying, and mindful storage are all key practices. Treat your mermaid tail with care, and it will reward you with many magical swimming experiences. Shop Now!

Learn more

Mermaid Swimwear: Swimsuits, Swimming Costumes and Matching Outfits