An extremely fine, rare and valuable fabric produced from the long silky filaments or byssus excreted by several molluscs (particularly Pinna nobilis, rough penshell) by which they attach themselves to the sea bed.

A body of water that separates three of the main islands of Japan, i.e. Honshu, Shikoku and Kyushu.

The sea that stretches from the Ionian Sea to the Gulf of Venice. It is located between the Italian and Balkan peninsulas.

Frozen seawater.

Alternative spelling of seawolf

(idiomatic) Ocean conditions that are very windblown and messy, possibly to the point of being inimical to surfing and other watersports.

Marine blue-green algae (cyanobacteria, actually brown coloured) of the genus Trichodesmium.

plural of sea lion

A sea in northern Europe, connected to the Atlantic.

Any unidentified sea monster, especially one resembling a snake or dragon.