Jellyfish diameter; the tentacles and mouth parts usually extend beyond this bell dimension. The smallest jellyfish are the peculiar creeping jellyfish in the genera "Staurocladia" and "Eleutheria", which have bell disks from to a few millimeters in diameter, with short tentacles that extend out beyond this, which these jellyfish use to move across the surface of seaweed or the bottoms of rocky pools. Many of these tiny creeping jellyfish cannot be seen in the field without a hand lens or microscope; they can reproduce asexually by fission (splitting in half). Other very small jellyfish, which have bells about one millimeter, are
Y.Bird from Jellyfish Island Y.Bird from Jellyfish Island Y.BIRD from Jellyfish Island is a series of periodically released single albums, created by Jellyfish Entertainment's CEO Hwang Se-jun for the purpose of showing the different sides of their artists to the public. Jellyfish Entertainment artists who have participated in the project so far have been Lee Seok Hoon, Seo In-guk, VIXX and VIXX member Leo. Y.Bird from Jellyfish Island with Lee Seok Hoon by South Korean singer, Lee Seok Hoon. It was released on June 14, 2012, under the Jellyfish Entertainment label and was the first in the Y.Bird from Jellyfish Island project. "Y.BIRD from