pelagic vs oceanic

pelagic and oceanic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pelagic	No	Yes	No	No
oceanic	No	Yes	No	No

As adjectives, pelagic and oceanic are synonyms defined as:

pelagic and oceanic: relating to or occurring or living in or frequenting the open ocean

pelagic (adjective)	oceanic (adjective)
relating to or occurring or living in or frequenting the open ocean	relating to or occurring or living in or frequenting the open ocean
	constituting or living in the open sea
	resembling the ocean in apparent limitlessness in extent or degree