Dictionary:

silurid

  (sĭ-lʊr'ĭd, sī-)

Of or belonging to the family Siluridae, which includes various freshwater catfishes of Europe and Asia, typically having a short dorsal fin and a long anal fin.

A silurid fish.

[From New Latin Silūridae, family name, from Latin silūrus, a large freshwater fish, from Greek silouros, sheatfish.]

The noun has one meaning:

Meaning #1: Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin
  Synonym: silurid fish