Description
Discord 
This very tiny mod disables underwater dismount on most animals (Doesn't work on boats.)
FAQ:
Q: The animals and I still drown?
A: That is because this mod doesn't remove drowning
Q: Can I have the source for the mod?
A: The entire code for the mod is small but it took a bit of time to find what I needed for it to work, here it is:
@Mixin(LivingEntity.class)
public class MixinLivingEntity {
@Overwrite
public boolean rideableUnderWater() {
return true;
}
}
Q: Why does this not work with boats?
A: Because it doesn't.
Q: This mod is small, why not include it in some bigger tweaking mod?
A: That would require creating more tweaks and I don't actually have any other ideas for small tweak I would need yet.
Q: Does it integrate with other mods?
A: Maybe, I only tested it with Dragon Mounts: Legacy and it worked well enough.
Q: Is it incompatible with other mods?
A: Likely not.
Q: Please port it to [Mod loader] [version]
A: You can do it yourself if you really need to, however I will port it if a bunch of people ask me. (And it takes less than 5 minutes to get mixins working, so I am probably not porting it to 1.8)
Q: I found a bug in the mod.
A: The what now?