Answer: seasnake

AnswerCrossword Clue
SEASNAKE

Monster of the deep.

SEASNAKE

Preyer on tropical fish

SEASNAKE

Reef wriggler

SEASNAKE
Japanese delicacy
SEASNAKE
Pacific wriggler
SEASNAKEDangerous swimmer with an oarlike tail
SEASNAKEVenomous swimmer
SEASNAKESource of a venomous underwater bite
SEASNAKECoral reef inhabitant