Allen's perchlet (Zalanthias alleni) is a ray-finned fish of the family Anthiadidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 7.1 cm. It occurs at depths between 62 and 256 metres. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
This species is distinguished from its congeners by the following set of characters: segmented dorsal rays 14 (rarely 13); pectoral rays 16 (rarely 15 or 17), middle rays branched; lateral line complete, 31-36 tubed scales; no antrorse spines on ventral margin of preopercle; no scales on maxilla; relatively distinct in having a short dark stripe in front of the eye, a faint dusky stripe from behind the eye across upper side of body, and a faint small dusky spot at midbase of caudal fin (stripes and spot better developed in small specimens) .: elongated; Cross section: compressed.
Behavioural data for Allen's perchlet is currently being reviewed.
Marine; demersal; depth range 62 - 256 m . Subtropical; 29°S - 33°S Endemic to Western Australia.
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