Very cool fish! Years ago I owned a Priolepis nocturna... the most secretive fish I've known, evidenced by the fact that the photo I included of him in my TOTM article seven years ago was him IN THE BAG...
http://reefkeeping.com/issues/2004-09/totm/index.php
http://reefkeeping.com/issues/2004-09/totm/images/Clipboard01.htm
I was attracted to your thread by the reference to P. ascensionis and thus Ascension Island. Having owned Ascension fish in the past (Centropyge resplendens), and being familiar with the very few collection trips there in the past decade, I knew that the species designation for this fish of P. ascensionis was wrong.
But, to conclusively identify this species without knowing the collection locale was beyond my skillset, so I enlisted some help and fired off the photos... after all the family Gobiidae is one of the largest at over 2000 species and growing...
The two ichthyologists I emailed were Dr. Jack Randall and Dr. Rick Winterbottom. Jack is a good friend and the Godfather of modern ichthyology... simply put he's described more more valid reef fish species than any ichthyologist in history... now over 700 and still growing, despite Jack now being well into his 80s! He has a ton of species named in his honor with the species name randalli... and... yes... there is even a Priolepis randalli...
And if there was a Godfather of the genus Priolepis it would be Rick Winterbottom... he's the world expert on the genus, has done the most research, and described the most species of Priolepis... nearly half of the 30+ species! And, most recently Rick was given the nod by getting his own Priolepis named in his honor by two Japanese ichthyologists... Priolepis winterbottomi!
So in short, if there were two ideal people in the world to identify this species with the photos given it may be those two... and the good news I heard back from both and they independently gave the same ID... Priolepis semidoliatus... the half-barred goby! This makes much more sense, as this fish has a huge range throughout the Indian and Pacific Oceans...
Happy Friday! :celeb1:
Copps