Meaning of the word "sub aquatic" in English

What does "sub aquatic" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

sub aquatic

US /sʌbˈækwɑːtɪk/
UK /sʌbˈækwætɪk/

Adjective

existing, occurring, or done under water

Example:
Divers explored the vibrant subaquatic ecosystem.
The documentary featured stunning footage of subaquatic life.