• (n.) Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming. Found on http://thinkexist.com/dictionary/meaning/hydrophid/
Hy'dro·phid noun [ Hydro- , 1 + Greek ... a small serpent.] (Zoology) Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming. Found on http://www.encyclo.co.uk/webster/H/77