Pseudohelice subquadrata is a species of crab in the family Varunidae.

It is found from the eastern Indian Ocean to the western Pacific Ocean, north to Japan, south to Eastern Australia, east to French Polynesia, west to Indonesia and Thailand.

Burrows are towards or above the high tide line on shores of estuaries and near river mouths of bays,[2] and can have offshoots horizontal beneath the surface as long as three metres.

In Eastern Australia, the carapace is dark purplish with varying amounts of cream mottling towards the rear.

[3] However, color across the range may also be yellowish-brown, orange, olive or dark green, again with light mottling.