How to detect an Amphibious unit?

Hi:

I'm doing an spell that drowns units in a water bubble, but I need to detect if that unit is an amphibious one. I tried to find if there is any way to detect if a unit can swim , or if a unit belongs to the Naga Race, but I didn't found nothing.

The only solution that I have is to create a function that makes unit type comparison with all the nagas, but I think it's not the best way.

Is there any idea??? Thanks in advance

Not to my knowledge. But you can: set point value, compare types of units or detect when a skill is learned/used/otherwise attained.

Amphibous are considered neither ground nor flying. So check the unit types UNIT_TYPE_GROUND and UNIT_TYPE_FLYING. If both return false, you have a amphibious unit. Clear?

Like the water

Yes, it's kind of compareable