What is "sucking fish"

Sucking \Suck"ing\, a. Drawing milk from the mother or dam; hence, colloquially, young, inexperienced, as, a sucking infant; a sucking calf.

I suppose you are a young barrister, sucking lawyer, or that sort of thing.
--Thackeray.

Sucking bottle, a feeding bottle. See under Bottle.

Sucking fish (Zo["o]l.), the remora. See Remora.
--Baird.

Sucking pump, a suction pump. See under Suction.

Sucking stomach (Zo["o]l.), the muscular first stomach of certain insects and other invertebrates which suck liquid food.

n. marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects [syn: remora, suckerfish]