"It is characterised by this very high central ridge, with black lines in the shape of an almond around it. Four small black lines radiate out from it in opposite directions and at right angles to each other. It is also found all over the Maldives, and is identical externally, but it is not found, for instance, in the Red Sea or Arabian seas. Biogeography is marvellous!"
Comment from Nathalie Yonow
It is characterised by this very high central ridge, with black lines in the shape of an almond around it. Four small black lines radiate out from it in opposite directions and at right angles to each other. It is also found all over the Maldives, and is identical externally, but it is not found, for instance, in the Red Sea or Arabian seas. Biogeography is marvellous!