Stygiocaris is a genus of shrimp from caves in the North West Cape and Barrow Island, Western Australia.

[2] Stygiocaris is highly troglobitic, being transparent, less than 20 mm (0.8 in) long and with reduced eyes.

[1] Other distinguishing features include the shape of the fifth and sixth abdominal somites, and the bases of the antennae.

[1] The two species of Stygiocaris were the first cave shrimp to be reported from Australia, and the type specimens were mostly taken from Kuddumurra Well, from which the fish Milyeringa veritas was described in 1945.

[1] The temperature in the well was recorded as 29–30 °C (84–86 °F), and it contained fresh water, but is influenced by the tides.