Jellyfish of Scotland: A Snorkeler's Guide

Ah, Scotland. Known for its rich history, captivating landscapes, and mysterious lochs. But delve a little deeper—literally—into its coastal waters, and you'll encounter a mesmerising array of marine life. Amongst the diverse species that call Scotland’s waters home, jellyfish are perhaps some of the most enchanting, yet misunderstood creatures. If you're considering a snorkeling adventure in Scotland, here's a guide to some of the most common jellyfish species you might come across.

1. Moon Jellyfish (Aurelia aurita)

Arguably the most recognisable of all jellyfish, Moon Jellyfish are named for their saucer-shaped, translucent bell that resembles a full moon. They can be recognised by the four horseshoe-shaped gonads visible through their bell. These creatures typically measure up to 40cm in diameter. While they do have stinging cells, their sting is generally harmless to humans, causing at most a minor irritation.

2. Lion's Mane Jellyfish (Cyanea capillata)

The Lion's Mane is the largest species of jellyfish and is easily distinguishable by its dense mass of long, hair-like tentacles and its reddish-brown bell. During summer months, they are more commonly sighted in Scottish waters. Although their sting can be painful, it's rarely dangerous to humans. However, it's always recommended to keep a safe distance.

Lion’s Mane Jellyfish 

3. Compass Jellyfish (Chrysaora hysoscella)

This striking jellyfish has a creamy-yellow bell adorned with brownish-red V-shaped markings that look similar to a compass. Its tentacles can give a painful sting, so snorkelers should steer clear if they spot one. They typically measure around 30cm in diameter but can grow larger.

4. Blue Jellyfish (Cyanea lamarckii)

Although similar in appearance to the Lion’s Mane, the Blue Jellyfish is smaller and has a distinct blue or yellowish tint. These jellyfish are often found drifting along the western coasts of Scotland during the summer. Their sting can be slightly painful, so it's best to give them plenty of space.

5. Barrel Jellyfish (Rhizostoma pulmo)

The Barrel Jellyfish is the UK’s largest species, with some reaching up to 90cm in diameter. They have a massive, rubbery bell that is opaque and frilly. They’re commonly spotted off the west coast of Scotland. Though they look intimidating, their sting is relatively weak and poses little threat to humans.

Safety Tips for Snorkelers:

While the majority of jellyfish stings in Scottish waters are not life-threatening, they can be painful and cause discomfort. Here are some quick safety tips:

• Avoid Touching: The best way to avoid getting stung is to steer clear of jellyfish.

• Treatment: If you're stung, rinse the area with vinegar if available. Immerse the sting in hot water to reduce pain and seek medical advice if the reaction is severe.

• Stay Informed: Before heading out, it's always good to check local advisories for any jellyfish blooms or warnings.

Scotland's waters are a veritable treasure trove for marine enthusiasts. While jellyfish are just one of the many wonders you'll encounter, understanding and respecting these creatures will enhance your snorkeling experience. Dive in and enjoy the serene beauty of Scotland’s underwater world!

Discover Jellyfish for yourself on a Wild Swim Adventure from Large Outdoors.