Periophthalmus chrysospilos Bleeker, 1853
photo by Ratmuangkhwang, S.

Family:  Oxudercidae (Mudskippers), subfamily: Periophthalminae
Max. size:  12.9 cm SL (male/unsexed)
Environment:  demersal; brackish; marine
Distribution:  Eastern Indian Ocean: eastern India to Indonesia.
Diagnosis:  Distinguished by the following: joint ventral fins; ventral fins situated directly behind pectoral fins; pelvis connected with shoulder girdle (Ref. 92840); pelvic fins totally united into a rounded disk; Dl tall, its margin straight, no stripes or spots on fin, first two spines elongate in males, only first spine elongate in females, first spine in males relatively longer than first spine in females; D2 with dusky stripe mesially; dorsal fins not connected by membrane; Dl with 7-10 spines; longitudinal scale count 64-77; head width 12.6-2l.8% SL; pelvic fin length 12.4-16.8% SL; length of anal fin base 16.7-20.6% SL; length of D2 base 16.3-24.3% SL; total D2 elements 12-13; total anal fin elements 11-13; TRDB 15-19 (Ref. 5218).
Biology:  An intertidal and amphibious air-breather (Ref. 31184) found in brackish mangrove and nipa palm areas (Ref. 7050). Actively shuttling back and forth between rock pools and air (Ref. 31184).
IUCN Red List Status: Least Concern (LC); Date assessed: 20 June 2017 Ref. (130435)
Threat to humans:  harmless


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