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This time, I could shooting valuable male ecology of  Tremoctopus gracilis  (Eydoux & Souleyet, 1852) at Palau. That is probably of a third case in the world. Tremoctopus gracilis  is a very unique an octopus of open ocean-swimming with web on the arm. The male is very small compared to the female, So far, It's have been most captured in such investigation by the plankton net. The first discovery is by David Paul of Melbourne University. It was the world's first ecological photographed at Great Barrier Reef, in Australia. after that, first report is by Dr Norman in 2002. At that time, it has been reported to have the tentacles of cnidarians such as jellyfish. Then, that this species is holding tentacles at selectively Portuguese Man O' War ( Physalia physalis ) has also been re-reported at Tree of Life Web Project. So far, how to use of this jellyfish tentacles, it has been considered for the defense or attack. Tremoctopus gracilis  (Eydoux ...

This larva of a Blanket Octopus was taken at Omi Island Yamaguchi Prefecture Japan. Omi Island is located in the Sea of ​​Japan coast of Yamaguchi Prefecture. This larva of mantle length was about 4mm. Mantle is translucent, brachial membrane envelops head and arms. Ciliary process are lined to Mantle. Lateral view Among the larvae of the arm, dorsal arms is the most developed and the other arm is quite short. Dorsal arms has very large suckers. Sucker is gradually to bigger from the tip, and the largest sucker is fourth from the tip. Web of arms is not yet developed. Chromatophores present on inner edge of each sucker, and absent on funnel. Orange large iridophores are arranged around the eyes. Dorsal view Mantle typically triangular in shape. Dorsal mantle scattered with chromatophores. ventral view Large eyes are facing the ventral. Ventral mantle patterned with a band of yellow from red chromatophores along anterior margin. ...