Basically what you're going to do is play reverse Indiana Jones and then give the squid something to hold(mosa) while you put your jewels in his mouth. After a little bit when you swim way he'll be finished cuddling and he will let go of your mosa.while the Squid is cooling down from cuddling you should take this time to heal your cuddle buddy. After a while the squid will want to cuddle your cuddle buddy and then while he's holding him you put your jewels and his mouth and then run away. Rinse and repeat and hope to God he does not slap you.
Use a Mosa to tame this beast. Let the Mosa get grabbed wait a couple seconds get off feed it black pearls. Have your mosa on follow lowest, swim a bit away from the Tuso after feeding it, when the Tuso lets go the Mosa will swim to you. Repeat until Tuso it tamed. Super easy!
You need two people, one for feeding the black pearls and the other to feed the turtle that is in the grasp of the Tusoteuthis, with sweet vegetable cake for the health and to feed it stimulates berries as well