Cystiscus minutissimusis commonly referred to as Minute margin shell. Difficulty in the aquarium: There are no reports available yet that this animal has already been kept in captivity successfully. Toxicity: Toxic hazard unknown.
Cystiscus minutissimus lives in abundance on the bryozoan Amathia bisericata.Spawning takes place throughout the year. The transparent egg capsules are deposited singly on the stem of the bryozoan. Each egg capsules containing one red-coloured egg. After six or seven weeks one well-developed juvenile crawls from each capsule.