(biology) That lives near the bottom of a body of water. / Taking place near the bottom of a body of water.

(biology) Any demersal organism.

plural of demersal

In a demersal manner

Situated or growing or constantly under water, as leaves; submersed.

(obsolete) To immerse.

plural of demersion

The act of plunging into a fluid; a drowning. / The state of being overwhelmed in, or as if in, water.

Third-person singular simple present indicative form of demerse

present participle of demerse