Answer: narwhal

AnswerCrossword Clue
NARWHALBeluga relative
NARWHALArctic swimmer
NARWHALTusked Arctic swimmer
NARWHALTusked sea mammal
NARWHALArctic mammal
NARWHALArctic cetacean, the sea unicorn.
NARWHALMammal that's long in the tooth
NARWHALArctic whale
NARWHALTusked marine animal
NARWHALTusked marine creature of the Arctic
NARWHALTusked marine mammal
narwhalsmall arctic whale
narwhalan arctic aquatic mammal, also NARWAL, NARWHALE