What are these 'gills' on my sides?

[masterwampatoga]

I don't have a six-pack, not even close because I'm bulking but in the middle of my side there are two gill-like muscle formations on each side that run a few inches to where my pack would be if I had one. What are these things?

I used to swim and do tae-kwon-do as a youngster so idk if that caused some abnormal core/side core action.

Are they my obliques?

[GrindIT]

Obliques or ribs.

[phreshprince]

Congratulations. You are a gay fish

[M0hi]

Sorry to say this OP, new scientific evidence suggests that your prolonged exposure to water as a swimmer led to a biological evolution resulting in your new pre-functional gills. Hopefully if you spread your genes, a few generations down you'll have produced the first monkeyfishfrog.

In all srsness its either your obliques or serratus.

[anonymous]

Serratus

[XCRunner9]

Good job bro, you finally grew your gills. Now you can swim while people be mirin those girls.

I try to work my gill muscles, but I'm not much of a swimmer, so yeah brah.

[rayishu]

Serratus Anterior
http://depts.washington.edu/msatlas/images/shserant.jpg

[crazdave]

[avodo]

Gills lmao. That's your serratus.