Order : Perciformes
Family : GOBIIDAE
Species : Acentrogobius janthinopterus
Maximum Length : 12 cm

The Green-spotted Goby (or 'Robust Mangrove Goby') occurs in estuarine and shallow mangrove habitat of varying salinity, from freshwater to saline. It reaches a maximum length of around 12 cm.

The sides of the head and base of the pectoral fins are patterned with broken horizontal dark stripes. The fins are somewhat transparent, and the dorsal and tail fins are sparsely patterned with dark spots and flecks.

Tiny pinprick green spots and larger dark blotches adorn the lower half of the flanks.

This species is typically associated with muddy substrate.

Acentrogobius janthinopterus ranges from Sumatra, through Indonesia to the Philippines, Australia and the western Pacific Ocean.

Fig 1 : Green-spotted Goby on muddy substrate in mangrove habitat at Pulau Semakau, Singapore.

Fig 2 : Typical mangrove habitat at Pulau Semakau comprising original mangrove on the left, and recently planted mangrove on the right.


References :

Larson, H.K. and Lim, K.P. 1997. A Guide to Gobies of Singapore. Singapore Science Centre.