Tag: Blue-Spot Damselfish (Pomacentrus grammorhynchus)

The Bluespot Damselfish (Pomacentrus grammorhynchus) appears to be a relatively common species around Koh Phangan, although not found in great numbers.

Growing to a maximum length of around 12cm, adults have generally greyish/olive colouration but are distinguished by the small, neon blue spot found on the upper edge of the caudal peduncle.

As with many of the "reef-dwelling" Damsels, juveniles vary significantly in appearance from the adults. The juvenile Blue-Spot Damselfish is a dark blue at the head and upper front end of the body, gradiating to yellow towards the lower, rear area and adjacent fins.

There are 2 - 3 neon blue lines, originating at the head and converging along the upper body until ending at a dark, ocellated spot at the rear of the dorsal fin.

As with the adults, there is a small neon blue spot at the upper caudal peduncle, although this is far less pronounced in juveniles.

The Bluespot Damselfish (Pomacentrus grammorhynchus) appears to be a relatively common species around Koh Phangan, although not found in great numbers.

Growing to a maximum length of around 12cm, adults have generally greyish/olive colouration but are distinguished by the small, neon blue spot found on the upper edge of the caudal peduncle.

As with many of the "reef-dwelling" Damsels, juveniles vary significantly in appearance from the adults. The juvenile Blue-Spot Damselfish is a dark blue at the head and upper front end of the body, gradiating to yellow towards the lower, rear area and adjacent fins.

There are 2 - 3 neon blue lines, originating at the head and converging along the upper body until ending at a dark, ocellated spot at the rear of the dorsal fin.

As with the adults, there is a small neon blue spot at the upper caudal peduncle, although this is far less pronounced in juveniles.

Alan's picture
Blue-Spot Damselfish (Pomacentrus Grammorhynchus) - Adult

An adult Blue-Spot Damselfish (Pomacentrus Grammorhynchus) photographed in the shallow water between the beach and reef at Mae Haad/Koh Ma.