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sea pen |
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sea pen, long, slender colonial organism of the same phylum as the jellyfish. Sea pen colonies are formed by several genera of the order Pennatulacea. The colony consists of a stalk formed by an organism called a primary polyp (see polyp and medusa polyp and medusa, names for the two body forms, one nonmotile and one typically free swimming, found in the aquatic invertebrate phylum Cnidaria (the coelenterates). ..... Click the link for more information. ) and short branches formed by secondary polyps. The stalk, embedded in sand or mud, holds the colony upright. Sea pens differ from the closely related sea pansies sea pansy, fleshy, leaf-shaped colony of marine organisms belonging to the genus Renilla in the same phylum as the jellyfish. The colony consists of a stalk formed by a large organism called a primary polyp (see polyp and medusa ) that is thrust into soft ..... Click the link for more information. and sea feathers by the form of the colony. Sea pens are marine organisms; they are found on Atlantic and Pacific coasts in shallow to moderately deep water. Some reach a length of 2 ft (61 cm) or more. They belong in the phylum Cnidaria Cnidaria (nīdâr`ēə) or Coelenterata ..... Click the link for more information. , class Anthozoa, order Pennatulacea. |
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Late in 1997, as the deadline approached for Keiko's next step to freedom, to an Icelandic sea pen, a dispute arose among the adults in charge. From there, it was onto a barge and a brief sail under blue skies, past spectacular 800-foot-high volcanic cliffs to a sea pen the size of a football field, where Keiko will try to adapt to his old environment. Following treatment, otters convalesced in sea pens for a month or more. |
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sea pen
