Periophthalmus gracilis Eggert, 1935
Graceful mudskipper
Periophthalmus gracilis
photo by Polgar, G.

 Family:  Gobiidae (Gobies), subfamily: Oxudercinae
 Max. size:  4.5 cm SL (male/unsexed)
 Environment:  demersal
 Distribution:  Indo-Pacific: Indonesia, Malaysia, Singapore, Australia, and the Philippines.
 Diagnosis:  Distinguished by the following characteristics: no pelvic frenum, or if present, only visible with magnification; pelvic fins totally separate; D 1 short and rounded, brown inframarginal stripe terminating into a prominent black spot, no elongate spines; D2 with single dusky stripe mesially; dorsal fins not connected by membrane; Dl with 9'-11 spines; longitudinal scale count 52-70; head width 14.2-19.3% SL; pelvic fin length 11.7-15.1 % SL; length of anal fin base 17.8-21.1% SL; length ofD2 base 18.8-21.3% SL; total D2 elements 12-13; total anal fin elements 11-12; TRDB 14-20 (Ref. 5218).
 Biology:  An intertidal and amphibious air-breather that actively shuttling back and forth between rock pools and air (Ref. 31184).
 IUCN Red List Status: Not Evaluated  (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Capuli, Estelita Emily - 23.02.93
 Modified by: Reyes, Rodolfo B. - 27.02.14

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