spoutfish

from The Century Dictionary.

• noun A bivalve mollusk which squirts water through its siphons, as the common clam, razor-shell, and many others.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A marine animal that spouts water; -- applied especially to certain bivalve mollusks, like the long clams (Mya), which spout, or squirt out, water when retiring into their holes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A marine animal that spouts water; applied especially to certain bivalve mollusks that squirt out water when retiring into their holes.