poacher vs sea poacher

poacher and sea poacher both are nouns.

Word	Noun	Adjective	Verb	Adverb
poacher	Yes	No	No	No
sea poacher	Yes	No	No	No

As nouns, poacher and sea poacher are synonyms defined as:

poacher and sea poacher: small slender fish (to 8 inches) with body covered by bony plates; chiefly of deeper northern Pacific waters

Other synonyms of poacher include sea poker.

poacher (noun)	sea poacher (noun)
small slender fish (to 8 inches) with body covered by bony plates; chiefly of deeper northern Pacific waters	small slender fish (to 8 inches) with body covered by bony plates; chiefly of deeper northern Pacific waters
a cooking vessel designed to poach food (such as fish or eggs)
someone who hunts or fishes illegally on the property of another