[1] It is found in the Pacific Ocean, off of Japan, Guam, Indonesia, Fiji, and the Solomon Islands.

[2] It lives in caverns or under ledges amongst rocky or coral reefs at depths of 15–40 metres (49–131 ft), where it can grow to lengths of 12 centimetres (4.7 in).

[1] This species is ovoviviparous, with males carrying eggs and giving birth to live young.

[2] D. naia can be identified by its colour pattern of 24–31 alternating pale yellow and maroon bars.

Its tail fin in mostly red, with broad white upper and lower margins.