A large blackish seaweed (Agarum turneri) with perforated fronds.

plural of sea colander

plural of sea mouse

A marine polychaete worm (genus Aphrodita) with the body covered in a dense mat of setae. / The dunlin.

plural of sea onion

Drimia maritima, the sea squill, native to Mediterranean and adjoining coasts. / Scilla verna, the spring squill, of Atlantic Europe.

coco-de-mer

(dated) batfish

plural of sea bat

Millepora alcicornis, a hydrocoral with a calcareous skeleton.