Regal Tang, Palette Surgeonfish, Blue Tang, Royal Blue Tang, Hippo Tang, Flagtail Surgeonfish or Blue Surgeonfish, <i><a href="//commons.wikimedia.org/wiki/Paracanthurus_hepatus" title="Paracanthurus hepatus">Paracanthurus hepatus</a></i>,  Family: Acanthuridae, Location: Germany, Ulm, Zoological Garden
<a href="//commons.wikimedia.org/wiki/User:Holleday" title="User:Holleday">Holger Krisp</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>