The New Zealand sand diver (Tewara cranwellae) is a species of sandburrower endemic to the waters around New Zealand where it can be found in tide pools and areas with sandy substrates down to a depth of 5 metres (16 ft).

This species can grow to a length of 7 centimetres (2.8 in) TL.

[1] The species was first described by Louis T. Griffin in 1933, who initially used the spelling Tewara cranwelli for the binomial name of the fish.

[2] The type specimen was collected from Smugglers Bay, Whangārei Harbour, in November 1931 by Lucy Cranwell.

Griffin named the species after Cranwell in her honour.