Sea Pen


In the center of the tank are sea pens (Cavernulina orientalis), which have a brown fluffy flower-like polyp.  They are found around AmamiOshima, Okinawa islands, and Indian Ocean. They are a kind of soft coral.

They have zooxanthellae in their body tissues. They live off of nutrients created by these zooxanthellae through photosynthesis. Therefore, during the day they expose their body out of the sand to let sunlight in. They are about 10 cm when they shrink, but they can stretch up to 40 cm during the day.

At Kagoshima City Aquarium, we successfully reproduced these corals in 2010 and received the Spawning Award from the Japanese Association of Zoos and Aquariums.

Creatures of this water tank