Very little specific information is available about the biology of the Mount Glorious spiny crayfish.
In general, freshwater crayfish have strong jaws and two pairs of secondary jaws, called maxillae, which allow them to consume a wide variety of both plant and animal matter (4) (5). Most crayfish are nocturnal, remaining in burrows during the day, or under stones and logs (5).
Breeding typically occurs in the autumn in most Euastacus species, when the male transfers sperm to the female to fertilise the eggs. In some species the first pair of appendages on the abdomen has grooves, along which the sperm flows, although the sperm may also be transferred to the female as a spermatophore (4). The female typically lays a large clutch of eggs which are attached to the bristles on the swimmerets, where they remain for the whole incubation period. Unusually among crustaceans, crayfish do not have a larval stage (4) (5).
Chemical signals are thought to play an important role in the crayfish life cycle, and may have a role in courtship, brood care and aggressive interactions between individuals. Aggression is a common crayfish social behaviour which establishes a dominance hierarchy, with more dominant individuals gaining better access to shelter, food and mating partners (6).