Lions Mane Jellyfish

Scientific name: Cyanea capillata

Phylum: Cnidaria

Class: Scyphozoa

Description: Large with broad bell flattened at top. It has many arms, with tentacles in 8 clusters on 8 primary lobes. Color and size vary geographically; can be pinkish, yellow and orange-brown, or dark brown and red.

Distribution: Eastern coast of North America, particularly in North Atlantic .

Locomotion: There are muscles in the bell for contraction, using water to control vertical movement. However, they are mostly dependent on current and tides for movement, making them zooplankton.

Food gathering: Have stinging apparatus on tentacles called ‘nematocyst’ that bursts and paralyzes prey. Mouth is on the underside of the bell.

Gas exchange: They lack organs for gas exchange, so it occurs by simple diffusion across their bodies.

Reproduction: They undergo sexual reproduction, and sexes are separate. They have a life cycle called ‘alternation of generations’, where the free swimming adult is called a medusa, the sessile juvenile is called a polyp.

Interesting facts: This is the largest jellyfish, and can grow larger than 1m across. Young fish sometimes huddle beneath their bell and swim with them.

Contact

Ocean Sciences

230 Elizabeth Ave

St. John's, NL A1B 3X9 CANADA

Tel: (709) 864-2530

Fax: (709) 864-2552

becomestudent@mun.ca