I'm a shark y'all just koi fish
Octopus, oysters

from Lil Wayne (Ft. Fabolous & Juelz Santana) – You Ain't Got Nuthin' Lyrics on Rap Genius

Meaning

Sharks eat all these other enumerated sea creatures..

Note also the implied “koi”/“coy” pun

To help improve the meaning of these lyrics, visit “You Ain't Got Nuthin'” by Lil Wayne (Ft. Fabolous & Juelz Santana) Lyrics and leave a comment on the lyrics box