But shallow water.
The top photo is an Indo-Pacific Sergeant fish which is different from other sergeant fish because of the yellow on it's back. There's not a Hawaiian name for this specific species but the Hawaiian Sergeant fish is known as mamo. The difference between the two fish is the yellow on the Indo-Pacific Sergeant.
You're feeling smarter already, huh?
This is the ever ellusive humuhumunukunuku a pua'a (pronounced hoomoo-hoomoo-nookoo-nookoo-ah-poo-ah-ah) Try saying that three times really fast. Just try saying it once! LOL
There are several varities of the humu, also known as a triggerfish. This is the "lagoon triggerfish" identifed by the blue "hat" on top.
These were both taken in the waters off Ka'anapali Beach on Maui.