κῆτος (kētoskay'-tosnounsea monster)
[Grk] κῆτος LN: 4.61 GK: G3063 Hebrew: דָּג, לִוְיָתָן, רַהַב, תַּנִּין
Derivation: probably from the base of χάσμα;
Strong's: a huge fish (as gaping for prey)
KJV: --whale.
See: χάσμα