These guys are a must-have in Aberration; they are always awake (at least in the bioluminescent area), and thus always have their night buff. Of course, this also means you must always be wary of wild ones while in their territory.
When out at night, be sure to take this with a raft or quetzal with platform, so when it is tired, you can get it back to base without it being attacked. Just a tip to ensure that your prized Megalosaurus doesn't die whilst you are out.
Got one in baby stage now on 338 official, keep it unconscious during the day (make it stay awake) it goes through food liek it does at night. This one while sleeping in the day eats 1 meat a second, its insane