Tag: Alexander's Damselfish (Pomacentrus alexanderae)

The Alexander's Damselfish (Pomacentrus alexanderae) seems to be fairly common around inshore reef areas, particularly those around Koh Tao.

Due to its unremarkable colouration, the is one of the species that appears to go largely unnoticed by divers and snorkellers, even though it tends to be found in reasonably large groups.

Growing to a maximum length of around 10cm, this species is easily distinguished from its locally occurring relatives by its overall pale grey colour, with a large black spot at the base of the pectoral fin and black tips to the dorsal spines

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The Alexander's Damselfish (Pomacentrus alexanderae) seems to be fairly common around inshore reef areas, particularly those around Koh Tao.

Due to its unremarkable colouration, the is one of the species that appears to go largely unnoticed by divers and snorkellers, even though it tends to be found in reasonably large groups.

Growing to a maximum length of around 10cm, this species is easily distinguished from its locally occurring relatives by its overall pale grey colour, with a large black spot at the base of the pectoral fin and black tips to the dorsal spines

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Alan's picture
Alexander's Damselfish (Pomacentrus Alexanderae)

An Alexander's Damselfish (Pomacentrus Alexanderae) at Aow Leuk, Koh Tao.

The main distinguishing features are visible in this shot, namely: the large black spot at the base of the pectoral fin and the black-tipped dorsal rays, although these are less clear.