sandhopper vs beach flea

sandhopper and beach flea both are nouns.

Word	Noun	Adjective	Verb	Adverb
sandhopper	Yes	No	No	No
beach flea	Yes	No	No	No

As nouns, sandhopper and beach flea are synonyms defined as:

sandhopper and beach flea: small amphipod crustaceans that hop like fleas; common on ocean beaches

Other synonyms of sandhopper include sand flea, sand hopper.

sandhopper (noun)	beach flea (noun)
small amphipod crustaceans that hop like fleas; common on ocean beaches	small amphipod crustaceans that hop like fleas; common on ocean beaches