You need god console or an op creature and a scuba tank to get this though it is at the bottom of the ocean and has a rage ability which draws everything to kill you and your tame (if you have one) and yes you guessed it me again
My buddy and I tamed a high level Spino and started walking it home as we were new and had no saddle. We lose sight of it for a few seconds and BLAME."killed by trodon". One millisecond later "trading killed by trodon". We didn't know thats how it worked and were thoroughly confused.