This worm-like animal made up of rings grows to the length of around 10 cm and spends its entire life inside a cone it builds using mucus and sediment particles. Only its gills protrude from the cone. They are up to 10 cm long and shaped like two spiral plumes. Gills can be white, orange, brown or purple.
Many types of urchins, including the purple sea urchin, tend to carry small stones, shells or pieces of algae and flowering plants. The real reason for such behaviour is unknown, but it is assumed that urchins use it to protect themselves from strong light, UV rays in shallows and perhaps even from predators.
It is white in colour with very recognisable dark brown spots that give it its name – Dalmatian snail.
It has two spiral tentacles on the front side of its body that serve as its chemical sensors. Tentacles have up to 25 lamellas increasing the surface for receiving chemical signals brought by the sea water.
Eel helena, eel, is a snake-like predatory fish. It grows to the length of 1.5 m and weighs of up to 15 kg. Its maximum lifespan is 15 years. It has thick and mucous skin with no scales so it easily squeezes through sharp rocks, both forward and backward.
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