n. A shark of the genus Scylliorhinus and some similar species. See dogfishn. Also called hound.n. A species of belonids of the genus Tylosurus, such as the T. jonesi (Bermuda) and T. acus.n. The bluefish, Pomatomus saltatrix, formerly called blue houndfish in Massachusetts. See cut under bluefish.n. The Spanish mackerel, Scomberomorus maculatus, formerly called speckled houndfish in Massachusetts.n. A name applied to fishes of the genus Tylosurus, especially to T. raphidoma and T. acus, both of the West Indies.