Great endli pics! Thanks for the information. I don't yet have the ck, picking her up this Saturday. I may move my polys to a different tank and allow the larger Jacks to contend with the knifefish. I don't know what it is about the polys but I consider them to be as much my children as my actual offspring.
The avatar is the skull of a river dolphin skeleton of unknown species. It was given to the University of Chicago nearly 100 years ago. After so long, it had fallen into disrepair. So, this past summer I slowly conserved it and promptly took pictures too! Thanks for asking. I wish I had an ichthyosaur skeleton! Good call on the whale guess!