If you go to a certain spot on ragnorok (i forgot what its called) but its next to the canyon the spinos spawn in. You can see these them jump out of the water and try to swim up the waterfall i just think thats a cool detail its the onl time they can get out of the water without instantly dying
These may look harmless and shy but NEVER EVER attack one if more are in the vicinity they will swarm you and suck your blood! But if you can kill them lovely tasty meat that works as veggiecake for Gary's
I'm fairly positive, whether by accident or design, aberrant salmon can not be fished. I built an enclosed fishing boat so I could safely fish for blueprints (hopefully saddles for abblerrant creatures) in the caves (the only place salmon it exist on the map) and after letting the game sit idle fishing for hours I have not gotten one bite.