Thor amboinensis

Acclimation: although very hardy, it needs slow drip acclimation to avoid salinity or pH shock.

Setup: in the aquarium it settles in any anemone; without one, it may host in certain corals, or perch on a frag or rock. It is a classic nano reef inhabitant.

Tankmates: keep it in a small group (three or more); it is peaceful towards its own kind and its neighbours. Avoid predatory fish that would eat such a small shrimp. In the wild it eats some of its host's tentacle tissue: keep an eye on the anemone or coral it lives in.

Moulting: it grows fast and moults about once a month. Sensitivities: like other invertebrates, it does not tolerate copper treatments or high nitrate. Keep iodine at a correct level so that moults go well. After a moult the shell stays soft for a while and it hides, because predators, and sometimes its own kind, may attack it.

Water: aim for 22 to 25.5 °C, a specific gravity of 1.023 to 1.025, pH 8.1 to 8.4 and 8 to 12 dKH.

In the wild it feeds on its host's tentacle tissue and on plankton particles trapped in the host's mucus.

In the aquarium it scavenges for meaty foods and also takes its host's mucus. Give it a varied diet: plankton, mysis, clam, flakes, frozen and prepared foods. None of the sources consulted gives a feeding frequency.