horse clam

horse clam

noun

Origin:
1830–40, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To horse clam
Encyclopedia Britannica
Encyclopedia

horse clam

(Tresus nuttallii and Tresus capax), either of two species of bivalve mollusks of the family Mactridae. These clams live in sand and mud flats along the coast of western North America from Alaska to Baja California. The shells of both species reach about 200 millimetres (8 inches) in length. They are roughly oblong in shape and creamy white in colour. Gaper clams have long, fused siphons that are contained in sheathlike tubes; the siphons are not fully retractable into the shell. The clams burrow up to one metre (three feet) deep into sediment. Gaper clams are edible and are heavily fished at spring tides. They are commonly infected with larval tapeworm cysts, but these are harmless to humans.

Learn more about horse clam with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;