You can lead a fish to water
but you really oughta
use an approved container
(a transportational no-brainer)
because unless your fish is well submersed
expect the worst

Fish have gills under the operculum
(I googled ‘em)

All this is VERY different to a horse
of course
a horse has lungs
and take their oxygen pretty much as it comes

Whatever

How did you get this number?