Mictyrids are known as soldier crabs because they occur in large dense armies. When disturbed all the animals quickly burrow under the surface, corkscrewing into an instantly made shallow cavity in the sand.
Feedback and queries should be sent to the Discovery Centre at Museum Victoria.
Please note, the Discovery Centre can help you only with questions about crustaceans from southeastern Australia. It can not advise on the care of pet hermit crabs or on crustaceans from other regions.