What's the difference between lumpfish and lumpsucker?

Lumpfish

Definition:

(n.) A large, thick, clumsy, marine fish (Cyclopterus lumpus) of Europe and America. The color is usually translucent sea green, sometimes purplish. It has a dorsal row of spiny tubercles, and three rows on each side, but has no scales. The ventral fins unite and form a ventral sucker for adhesion to stones and seaweeds. Called also lumpsucker, cock-paddle, sea owl.

Example Sentences:

(1) Several invertebrates, which are food for lumpfish, were examined for flagellates, but were neither infected nor showed evidence of cystic stages.
(2) In nature, lumpfish probably acquire parasites during winter when they aggregate and regurgitate into seawater because parasites can survive for short periods outside their host.
(3) Deliciously, some of those who may have sneered at people scarfing down eight burgers for a pound only to find they were horsemeat rather than prime beef, might as well have spent 40 quid a kilo on lumpfish roe rather than the eye-watering £1,280 that King's charge for a kilo of sevruga.
(4) Studies were conducted primarily to ascertain the mode of transmission of Cryptobia dahli parasitizing the digestive tract of lumpfish (Cyclopterus lumpus).

Definition:

Example Sentences:

(1) The lumpsucker proteinase exhibits low general proteolytic activity but acts effectively on the specific chromogenic peptide substrates.
(2) A proteinase has been isolated from the ovarian fluid of the lumpsucker (Cyclopterus lumpus).