"fish-shaped," 1870 in biology, 1879 in mythology, from ichthyo- "fish" + -morphic, from Greek morphē "form, shape," a word of uncertain etymology.
Entries linking to ichthyomorphic
ichthyo-
word-forming element meaning "fish," from Latinized form of Greek ikhthys "a fish" (in plural, "a fish-market"), from PIE root *dhghu- "fish" (source also of Armenian jukn, Lithuanian žuvis).