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sea pen

(Encyclopedia) 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…

Sea Peoples

(Encyclopedia) Sea Peoples, modern term for any of the groups of people who attacked Egypt and the E Mediterranean by sea and sometimes by land c.1200 b.c. They are recorded as having fought in…

sea pink

(Encyclopedia) sea pink: see leadwort.

sea pork

(Encyclopedia) sea pork: see tunicate.

sea robin

(Encyclopedia) sea robin: see sculpin.

sea slug

(Encyclopedia) sea slug, name for a marine gastropod mollusk that lacks a shell as an adult and is usually brightly colored. Sea slugs, or nudibranchs, are distributed throughout the world, with the…

sea snake

(Encyclopedia) sea snake, name for any of the venomous marine snakes of the family Hydrophidae, found in tropical waters of the Indian and Pacific oceans. The sea snake's body is flattened laterally…

sea spider

(Encyclopedia) sea spider, common name for members of the class Pycnogonida, long-legged, rather spiderlike organisms of the subphylum Chelicerata, widely distributed in marine waters. Most are tiny…

sea squirt

(Encyclopedia) sea squirt: see tunicate.

sea star

(Encyclopedia) sea star, also called starfish, echinoderm of the class Asteroidae, common in tide pools. Sea stars vary in size from under 1&fslsh;2 in. (1.3 cm) to over 3 ft (90 cm) in diameter…