Periophthalmus novemradiatus (Hamilton, 1822)
Pearse's mudskipper
photo by Scholtz, D.

Family:  Oxudercidae (Mudskippers), subfamily: Periophthalminae
Max. size:  10 cm SL (male/unsexed)
Environment:  demersal; brackish; marine, amphidromous
Distribution:  Indian Ocean: India.
Diagnosis:  Dorsal spines (total): 9-11; Dorsal soft rays (total): 11-12; Anal spines: 1-1; Anal soft rays: 12-13. This is a sexually dimorphic species, with males possessing greatly elongate first spine of first dorsal fin, reaching eighth element of second dorsal fin when appressed; when preserved first dorsal fin brown or black with white distal edge, no spots; margin of first dorsal fin concave in males while concave to straight in females; second dorsal fin with two black bands, broader one located inframarginally and the other located medially, black spots basally on membrane between dorsal fin elements; pelvic fin with prominent frenum and inner rays fused for more than half of length. D1 modally IX; D2 modally I,12; A modally I,13; caudal fin rays modally 15 segmented rays, with first and last two rays unbranched; 62-67 lateral scale rows; 18-24 predorsal scales (Ref. 83659).
Biology:  An intertidal and amphibious air-breather that actively shuttles back and forth between rock pools and air (Ref. 31184).
IUCN Red List Status: Data deficient (DD); Date assessed: 20 June 2017 Ref. (123251)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 23.02.93
Modified by: Kesner-Reyes, Kathleen - 18.08.09

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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