Taken from Advancedaquarist, sun corals are hermaphroditic and can also reproduce sexually and/or asexually by producing planulae larvae11/12, which they will also do in aquariums at times. These can drift around an aquarium until they eventually settle and develop into a new colony. So, don't be surprised if new colonies seem to spring up from nowhere in an aquarium containing a well cared for specimen. Like this.
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Four legs good. Two legs better.
Current Tank Info: 50G SPS/NPS Reef, 120G Mixed Reef, 120G FOWRL, 29G Seahorse tank, 20G Observation tank,
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