Periophthalmus weberi Eggert, 1935
Weber's mudskipper
Periophthalmus weberi
photo by Polgar, G.

Family:  Oxudercidae (Mudskippers), subfamily: Periophthalminae
Max. size:  10 cm SL (male/unsexed)
Environment:  demersal; brackish, amphidromous
Distribution:  Western Pacific: restricted to Irian Jaya (Indonesia), Papua New Guinea and northern Australia. Records from the Ganges Delta in the Indian region probably refer to Periophthalmodon septemradiatus.
Diagnosis:  Dorsal spines (total): 5-17; Dorsal soft rays (total): 10-13; Anal spines: 1-1; Anal soft rays: 8-11. Distinguished by the following characteristics: Pelvic frenum lacking or only visible with magnification; in males, Dl height moderate, its margin almost straight, no stripe on fin only a few pale blue spots in life, white spots in preservative, all spines extend beyond membrane and first spine more than twice as long as others, dorsal fins contiguous, connected by membrane; in females, Dl negligible, represented by only a few short spines; D2 in both sexes lacking stripes; D 1 with 4-16 spines; longitudinal scale count 46-52; head width 15.4-19.4% SL; pelvic fin length 15.0-17.1 % SL ; length of anal fin base 14.2-18.5% SL; lengthofD2 base 20.6-26.8% SL; total D2 elements 11-14; total anal fin elements 9-12; TRDB 12-17 (Ref. 5218).
Biology:  Inhabits brackish mangroves including the margin of estuaries and tidal creeks. Also penetrates the lower, tidal portions of freshwater streams (Ref. 44894). Appears to be restricted to tidal fresh waters in areas of mangrove and nipa palms (Ref. 2847). Amphibious air-breather (Ref. 31184).
IUCN Red List Status: Least Concern (LC); Date assessed: 17 February 2020 Ref. (130435)
Threat to humans:  harmless
Country info:   
 


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