Ok, I came up with this a while ago and had to start thinking about it and I made it, my OD, Tyrannustonpsarion.
OD means “Original Dinosaur” because I was bored Andy wanted to do something original. Tyrannustonpsarion means “Tyrant of Fish” Because it was a semi-large Tyrannosaur that was almost specifically a Piscivore. It was a solitary fisher, but when it needed a more substantial meal, it would gang up in groups of 2-4 and take down the large-ish herbivores around where it lived. It is also, closely related to Daspletosaurus with only minor differences, (Jaw slant, Narrower teeth, somewhat weaker bite, longer claws) And when people found its bones, they thought it was a Daspleto until they found more fossils in the area suggesting it was a completely new Dinosaur.

And here, we have my “Tyrant of Fish” hauling in its catch to uses it bite and claws to try and eat it.