[9] Male Pacific leaping blennies have prominent head crests and orange-red dorsal fins.

They are able to dwell on land for several hours at a time, and have been reported performing many activities, including foraging and mating while out of the water.

[11] In a study performed by Tonia Hsieh of Temple University, in Philadelphia, Pennsylvania, it was discovered that members of A. arnoldorum are able to thrive on land due to their ability to twist their tails axially at 90 degrees, to propel their bodies.

Hsieh noted that the twisting of the tail was a behaviourism unique to A. arnoldorum and species in the genus Andamia; the two genera were subsequently considered terrestrial.

The author, Curtiss, is known to have read The Sea-Beach at Ebb-Tide: A Guide to the Study of the Seaweeds and the Lower Animal Life Found Between Tidemarks by Augusta Foote Arnold (1844-1903) and gave several taxa a similar epithet.