These tiny shrimps in rockpools look almost invisible because you can see through most of their body. Their front legs can have red bands that look like mittens. They have five pairs of legs, two pairs of antennae and a strong paddle for a tail.
They can walk using their legs and they have tiny paddles under their abdomen for slowly swimming.
For a quick getaway they can shoot backwards at speed by flicking the large paddles on their tail.
They feed on seaweed and decaying material. Besides rockpools, they also live among seaweed, seagrass meadows and down to about 12 metres deep. They are an important source of food for many animals including fish.