What is going on with my fish? Bloated!

[rmkblades]

I have no idea what was inside the fish. I was tempted to check, but wasn't sure I was prepared for what might ooze or explode out of the poor fish. Truly boggling as to what exactly was going on. Here is a video of the catfish from just a few days before it died.
Bloated catfish

 

[rmkblades]

I've never seen one at all so I appreciate learning from you Rouben. This is an astounding bloat, if that's what it was. Were you able to determine what it was inside - water or some bodily fluid or... ?

No clue my friend, but I posted a video of the catfish. Looks like he was taking steroids

 

[rmkblades]

https://imgur.com/a/Wa2kYXf