Once found a Megachelon, search for a Microbe Swarm in it's premises. draw the swarm to the turtle and swim under it until taming starts. the level of the swarm seems to effect taming speed, effectiveness is always 100%. multiple swarms seem to be possible to shorten taming time even more. salmon bites reset taming completely! once taming starts leave it quickly by moving out of render. tribe log will inform you about finished tame.

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