A marine mammal of any of several genera in the family Otariidae (the eared seals). / (heraldry) A monster consisting of the upper part of a lion combined with the tail of a fish.

(rare) Alternative form of sealion (“engage in disingenuous debate”)

Any of many marine echinoderms, of the class Echinoidea, commonly found in shallow water, having a complex chewing structure named Aristotle's lantern.

(geography) An inland sea bound by Southeastern Europe in the west, Eastern Europe in the north and northeast, and Turkey in the south.

The sea between Europe and Africa.

(idiomatic) A profound transformation; a metamorphosis.

A sea in the central and east central part of the Mediterranean.

Any of several marine stinging box jellyfish found in north east Australia and South East Asia, some deadly, especially Chironex fleckeri, Carukia barnesi, and Malo kingi.

That part of the sea out of sight of land. / A sea open to all nations, i.e. not a mare clausum.

An arm of the Pacific Ocean between mainland China and the Korean peninsula.