Hi everyone!
I went to Okinawa located in the Japanese most south last month and visited at several rivers.
Okinawa area is subtropical zone.
I took a lot of pictures and video clips there.
Stiphodon percnopterygionus
Those were there crowdedly.
http://www.youtube.com/watch?v=f6k_IQU7sLY
Stiphodon atropurpureus
They come from the south by a Kuroshio Current.
The number of living in Okinawa may be increased by global warming.
http://www.youtube.com/watch?v=w4u8l0uVXoc
Stiphodon sp.
They're Stiphodon.sp which started to be always checked in Okinawa from several years before.
Their scientific name is uncertain or unclear.
(17 May 2012)I add a postscript to the following.
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16 May 2012 - 11:42am
Ken Maeda, a researcher in OIST’s Marine Genomics Unit,
has identified a new freshwater goby species on the islands of Okinawa and Iriomote.
The species, Stiphodon alcedo, is described in the latest issue of the journal Cybium.
"A new species of amphidromous goby, Stiphodon alcedo, from the Ryukyu Archipelago"
http://www.oist.jp/pressrelease/oist-re ... yu-streams
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http://www.youtube.com/watch?v=uG7_YTeCuRs
Two males are quarreling.
This is the male by which the married color shows full.
The same male by which the married color shows half.
Lower right one is big female.
Another male with basic color.
Females
These aren't Stiphodon genus, but it's introduced here.
Sicyopus zosterophorum
http://www.youtube.com/watch?v=XZJGCPxsz-g
2 males are fighting.
Their female has a clear body.
The male changes the body color to appeal to the female.
But the female is not Sicyopus.
In fact, the male gets a wrong partner.
It is a female of Lentipes that he appeals.
Lentipes armatus
http://www.youtube.com/watch?v=qK18zeIO-ao
Males
Their female has a clear body too.
Therefore it is difficult to find them.
One male is surrounded by many females.
I am not used to English. Therefore,It is likely to sometimes misunderstand it.