Complex sentence: It is one of the known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual, others include also the jellyfish "Laodicea undulata" and "Aurelia" sp.1.
Split into simpler sentences: It is one of the known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual. Others include the jellyfish "Laodicea undulata" and "Aurelia" sp.1.