Tag: Signalfin Goby (Coryphopterus or Fusigobius Signipinnis)

I first spotted the little Signalfin Goby (Coryphopterus or Fusigobius Signipinnis) under some over-hanging rocks at Shark Island, Koh Tao.

Since then, i've had no trouble finding them in similar locations, although only around Koh Tao so far.

I'm a bit confused as to whether Coryphopterus Signipinnis or Fusigobius Signipinnis is correct as it seems to be listed as either one or the other, depending where you look (i'm going to list both until i can confirm which is correct).

I first spotted the little Signalfin Goby (Coryphopterus or Fusigobius Signipinnis) under some over-hanging rocks at Shark Island, Koh Tao.

Since then, i've had no trouble finding them in similar locations, although only around Koh Tao so far.

I'm a bit confused as to whether Coryphopterus Signipinnis or Fusigobius Signipinnis is correct as it seems to be listed as either one or the other, depending where you look (i'm going to list both until i can confirm which is correct).

Alan's picture
Signalfin Goby - female (Coryphopterus or Fusigobius Signipinnis)

It seems that the main difference between male and female is that the male has a slightly larger and more "pigmented" dorsal fin. This one, photographed at Aow Leuk appears to have a less colourful dorsal fin, so it's likely to be a female.

Alan's picture
Signalfin Goby - male (Coryphopterus or Fusigobius Signipinnis)

Based on the fact that the main distinction between male and female is the male's slightly larger and more "pigmented" dorsal fin, the assumption would be that this Signalfin Goby (Coryphopterus or Fusigobius signipinnis), photographed at