Phronima is a genus of small, deep sea hyperiid amphipods of the family Phronimidae.

[1] Phronima species live in the pelagic zone of the deep ocean.

[2] Instead of constantly feeding on a live host, females attack salps, using their mouths and claws to eat the animal and hollow out its gelatinous shell.

[4][5] Phronima species possess unique compound eyes adapted to detect blue-green wavelengths of light, which are prominent in the bioluminescent flashes of potential prey and predators.

These specialized visual adaptations aid Phronima in navigating the dim mid-ocean environment, where bioluminescence serves as an important ecological signal.