soapfish

from The Century Dictionary.

• noun A serranoid fish of the genus Rhypticus (or Promicropterus): so called from the soapy skin.

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

• noun (Zoöl.) Any serranoid fish of the genus Rhypticus; -- so called from the soapy feeling of its skin.

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

• noun Any of several serranoid fish, of the genus Rhypticus, that have a slimy mucus-covered skin.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun fishes with slimy mucus-covered skin; found in the warm Atlantic coastal waters of America