["Synthetical" aiptasia mutabilis RAPP (coelenterata) (author's transl)]

After being cultivated in the dark for some months and after being fed with food free of carotenoids during the time Aiptasia mutabilis (Coelenterata) loses its symbiontic algae (rich in brown fucoxanthin) and becomes transparent white. This disarranged symbiosis may be regenerated under light cultivation by adding different species of Chlorophyceae (Chlorella, Dunaliella) and chrysophyceae (Ochromonas, Cyclotella), but not of Cyanophyceae (Anabaena, Nostoc, Oscillatoria, Anacystis). - This changeable life system between coelenterata and algae may be a good example for further studies of the endosymbiosis problem.