Tuna in South Marsh Island??

[bay_slayer]

Guys i am working out here in south marsh island 146, i was wondering if anyone knew if there could be any Tuna out here. We are in about 230 ft of Blue water, but i wouldve thought we were in too shallow of water to have tuna. At night when I go outside I see schools of fish that look like exactly like tuna, and i watch em chase the flying fish. I just didnt think they were out here.