The side of the body is decorated with vertical rows of spots above the lateral line.

The other includes A. longimanus and A. punctatus which has a thick layer of skin covering the coracoid and an emarginate or symmetrical caudal fin.

[1] In A. longimanus and A. thoracatus, serrae on the end of the dorsal fin spine are proportionally longer in breeding males than in juveniles and females.

Males have their urogenital opening located at the end of a tube bound by integument to the anterior margin of the anal fin.

[1] The males use their modified anal fin as a means of internal insemination; the female can later lay the eggs in isolation.