Hi everyone!
I traveled to Okinawa in November and took lot of photos underwater in some rivers.
Okinawa is a district of Japan at the south end and is a sub-tropical climate.
Many amphidromous fish have been carried from the tropics by the Kuroshio Current.
I want to show the habits of nature of gobies of several kinds of Sicydiinae.

A new species of the Stiphodon genus was authorized again in Okinawa a few days ago.
The name is Stiphodon niraikanaiensis.
This new species was also discovered by Dr. Maeda.
http://link.springer.com/article/10.100 ... 013-0379-2
Unfortunately I have not yet watched the new species.
At least seven species of Stiphodon genus is confirmed in Okinawa of Japan.
(Inhabiting a lot)
Stiphodon percnopterygionus
Stiphodon alcedo
(It is slightly difficult to find it)
Stiphodon atropurpureus
(It is extremely difficult to find it)
Stiphodon imperiorientis
(Just several bodies were confirmed)
Stiphodon multisquamus
Stiphodon surrufus
(New species)
Stiphodon niraikanaiensis
Even if it is an extremely rare species in Japan, there may be their main habitat somewhere in tropics.

Stiphodon alcedo
Stiphodon alcedo that did not inhabit before spread very much recently.
Male nuptial coloration is extremely various.
There is the individual becoming black, and there is one becoming bright red.
The video clip is in Youtube.
http://youtu.be/rTanoaHxs-U

Stiphodon percnopterygionus
It is most common Stiphodon seen in Okinawa.
The video clip is in Youtube.
http://youtu.be/mumOXCPTvg0

Stiphodon atropurpureus
The population in Japan is small, but it has been teeming in Cebu in the Philippines.
The video clip is in Youtube.
http://youtu.be/nZtT4ihydKE

Lentipes armatus
They are living a lot but, underwater photography is difficult because it is very shallow rapids habitat.

Sicyopus zosterophorum
Population is small in Japan, but in the Philippines, they are teeming.

Sicyopus cebuensis
It can not only be seen in very rare in Japan, but in the Philippines, they are teeming.
I traveled to Palau and Guam two weeks ago and visited some rivers.
I took lot of pictures of Stiphodon, but am still arranging it.
I will show them as soon as rearranging is over.