One of the best tames ,just put some meat in ur hotbar and boom u have an itchy a fast water rocket , on mobile they are op since they dont get agro u can literally kill tons of megs without a single bite from them ,so for oil just tame an itchy and get a pick axe, , but WARNING : dont ever ever ever leave ur itchy while in water ,u will get immediately killed and wont be able to go back to the itchy , if its following you it will be spinning around like an electron so u cant mount it ,an advice u can go to the bottom and kill angelerfish u will get loot ,and angelergel u can then tame a manta lol ,u can go to the pole and hunt penguins for polymer another warning DONT LEAVE UR ITCHY because finding ur corpse in the ocean is not fun that if u find it , best thing to do if u want to loot a loot drop is to leave ur raft above you directly and have a bed in it so u can respawn and take ur loot if u died, and remember u can get dammaged by the cold in the night or in the pole , a good water tame but unreliable in serious cases