Acyrtus simon
Acyrtus simon Gasparini & Pinheiro, 2022

Family:  Gobiesocidae (Clingfishes and singleslits), subfamily: Gobiesocinae
Max. size:  3.223 cm SL (male/unsexed)
Environment:  benthopelagic; marine; depth range - 15 m
Distribution:  Southwest Atlantic: Brazil.
Diagnosis:  Dorsal soft rays (total): 8-9; Anal soft rays: 6-8; Vertebrae: 27-31. This species is distinguished from its congeners by the following characters: head deep, depth 19-21% SL; large pelvic disc 36-39% SL, its width 30-36% SL; eye diameter large 32-40% HL; pectoral-fin rays 21-23; shallow caudal peduncle 8-10% SL, its length 10-17% SL; anus-disc distance short 6-12% SL; anus-anal fin distance long 11-15% SL; snout length long 20-33% HL; interorbital space narrow 18-29% HL (Ref. 132134).
Biology:  Occurs from an intertidal habitat down to reefs at 15 m depth. It is commonly found taking shelter in cavities used by Diadema antillarum during the day, often sharing the protection from predators offered by spines with the Vitória-Trindade Chain (VTC) endemic Hypleurochilus brasil, Apogon americanus and a number of others hosts (Ref. 132134).
IUCN Red List Status: Critically Endangered (CR); Date assessed: 29 January 2024 (B1ab(iii)) Ref. (130435)
Threat to humans:  harmless


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