I actually thought of this while running from a meg.

Step 1: tame a dolphin

Step 2: take it out to a not so dangerous area and level it up only on health

Step 3: kill everything around the meg you want to tame

Step 4: plop the dolphin near the meg

Step 5: wait until the meg starts attacking it

Step 6: build a trap around the feasting shark

Step 7: knock out and feed

Big brain time