A. polymorpha may refer to:
Actinoseris polymorpha, a plant native to Brazil Adelieledone polymorpha, a cephalopod mollusc Amphiroa polymorpha, a thalloid alga Amphisphaeria polymorpha, a fungus with perithecial fruiting bodies Amyris polymorpha, a plant endemic to Cuba Anomis polymorpha, an owlet moth Apodochloris polymorpha, a green alga Asperitas polymorpha, a land snail Azteca polymorpha, a Neotropical ant