Ugly-Looking, Eel-Like Parasitic Marine Swimmers
Puzzle 9 of Vienna Hard Pack
Question is: Ugly-Looking, Eel-Like Parasitic Marine Swimmers
and the answer is: HAGFISH
Word Meaning:
HAGFISH — Any of several primitive eellike fish, of the family Myxinidae, having a sucking mouth with rasping teeth, and sometimes used as food or for eelskin leather.
Definitions from Wiktionary.