How to get a hesp worry free in 10 minutes:

Clear the area of piranhas before you do ANYTHING. Dilos can also be an obstscle as they're annoying af.

Use a tame for travel that can move quickly in the water so that you can get fish asap (not baryonyx because they always destroy corpses). Don't waste time using any fish under 1X. Kill them instead and leave the corpses around so that the hesp doesn't wander too far. ^^^! -AK

More Hesperornis Taming & KO Tips