what the heck is this?

It's a SHWAM!

What book is that from? I'm sure I've seen that before. Is it a JLofA issue? From the awful Detroit League era?

Oh! You wanna know what it's from!

Action Comics #539, Jan-1983, "Help! I'm a Prisoner in my Own Body!" Mera and Aquaman return to Mera's home dimension to battle V'lana and Aquaman loses out in a telepathic battle, as seen in this panel.

I just really liked the "sound" effect. It just seemed like a really good panel to post.

Shwam it is. I htought it was the aqua-version of "shwing" (from Waynes World). I'm glad I was wrong.
Shwee ya later!