Answer: dorsalfin

AnswerCrossword Clue
DORSALFINJarring sight at the shore
DORSALFINShark protrusion
DORSALFINHumpback feature
DORSALFINFish's stabilizing organ
DORSALFINWorrisome sight at a beach
DORSALFINWorrisome sight for a swimmer