The Sea Môr Aquarium is home to a variety of marine creatures, representing the diversity of life found in Welsh waters. Highlights include our moon jellyfish, octopus and rock pool adventure tank, where children can touch starfish, anemones and small crabs.

The aquarium allows close up views of the animals possibly only glimpsed in their natural environment. The guided tour, provided by Sea Trust marine biologists, is packed full of fun facts, creating an eye-opening experience for children and adults alike. The whole experience lasts around 45 mins. All children must be accompanied by a responsible adult.

The tour was very informative and interesting. [The guide] was brilliant, answering the kids questions simply and patiently, she even gave us tips on where to view seals and dolphins

Tracy C

Three-bearded Rockling

Brithyll Mair tair-barf

Gaidropsaurus vulgaris

Rocklings have long, sinuous bodies and at a quick glance, as they slither rapidly out of sight, could be mistaken for an eel. They are actually related to cod, and like cod, they have a chin barbel (or spike) as well as barbels on the head. The Three-bearded Rockling gets its name from the three barbels around its mouth. Rocklings have two dorsal fins, but the first one consists of a fringe of very short rays preceded by one longer ray. In our Rocky Shore tank, you can see our Three-bearded Rockling and its mesmerising fin which ripples along its back!

The Three-bearded Rockling is the largest found around the British Isles, growing up to 50 cm long, compared to the Northern Rockling which is just 15 cm long. They can live very deep in the sea, down to 150 m deep! In shallower water, they live amongst dense seaweed.

Fun Fact: Young rockling, known as ‘mackerel midge’ are metallic blue-green and are an important food item for tern and Puffin chicks!

Image result for puffin chick
Photo courtesy USFWS/Flickr

Conger Eel


Conger conger

The Conger eel is the largest eel found in Welsh waters and can reach 3 m long. Conger eels are nocturnal and stay in their hidey holes during the day. At night they emerge and swim freely, searching amongst the rocks and seaweeds for hidden crabs, fish, lobster, octopus and other bottom-dwelling animals.

A conger eel lives nearly its whole life an an immature fish. When it does finally mature, between 5-15 years old, it will spawn once and then die. They swim miles out into the deep Atlantic to their spawning grounds. The eggs hatch into a leaf-shaped ‘leptocephali’ larvae which drift back inshore over one to two years and metamorphose into young eels!

Leptocephali larvae

Moon Jellyfish

Moon jellyfish…

Yellow Bellied Terrapins

Yellow Bellied Terrapins

Spider Crab


Snake Locks Anemone