(archaic) sea urchin

plural of sea hedgehog

plural of sea scorpion

A document formerly carried by neutral merchant vessels in wartime to show their nationality.

plural of sea pass

A European sculpin, Myoxocephalus scorpius (synonym Cottus scorpius), having the head armed with short spines. / Any extinct chelicerate arthropod in the order Eurypterida.

plural of sea lettuce

Any of several edible seaweeds of the genus Ulva. / Similar seaweed species of other genera: / Monostroma spp., also known as the slender sea lettuce, a kind of algae.

A gorgonian coral with long flexible branches.

plural of sea willow