According to Toonen, he has kept Cassiopeia for 3yr intervals including reproduction. Monterey Bay Aquarium has also had great success in the past. Give the latter a call
In general, kreisels are often used for midwater jellyfish such as Aurelia. Cassiopeia would be best housed in 50g+ aquariums that have more length and width than height. Because they are photosynthetic, they will need an enormous amount of light (think sps
) and close to double to reproduce. Even though they rely upon zooxanthellae, they will need regular supplemental feedings (enriched nauplii). As for filtration, a sponge filter works well since they tend to favor raised ammonia levels.
Another interesting animal to research would be the sp. of Sepia (Cuttlefish) including dwarf cuttlefish, Sepia bandensis.