Alaska crab vs Paralithodes camtschatica

Alaska crab and Paralithodes camtschatica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alaska crab	Yes	No	No	No
Paralithodes camtschatica	Yes	No	No	No

As nouns, Alaska crab and Paralithodes camtschatica are synonyms defined as:

Alaska crab and Paralithodes camtschatica: large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan

Other synonyms of Alaska crab include Alaska king crab, Alaskan king crab, king crab.

Alaska crab (noun)	Paralithodes camtschatica (noun)
large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan	large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan
meat of large cold-water crab; mainly leg meat