I tried an experiment - I took one of the nursing mothers and dunked her in the lagoon!

She had a good time relaxing and floating around for a couple of minutes - with the baby under water! No harm done, though, mommy and child came up out of the water and went about their business.

It might be a good idea for a future enhancement, to not allow nursing mothers into the water, similar to the way swimming is prohibited under certain curcumstances now.