African dwarf frog. Injury? Illness?

[ncspuppy]

My adf had a large red bump on his head. I noticed it late last night. I was tired, but I tried to search online to see what the problem was. Coming up with nothing, I went to bed. So today, I go back to the tank to see if I can take a look at him again, and I can't find him. I've taken out all the decorations that serve as hiding places. I do not see the frog anywhere. Do they burrow? Is there any chance he is hidden in the gravel? I know injured animals will hide to stay safe, but I don't see him anywhere in the tank.

It's a 55 gallon tank. There is 1 other frog in there, and several fish. The frogs often hide, but they are normally easy to spot if you look for them. I'm sure he must be in there somewhere, it is a large tank. I'll find him.

But does anybody have any idea of what the red bump is? If I could find him, I'd post a picture, but I can't find him.

 

[59fifty]

yes they do burrow i thougt i have lost mine too but the were just in the rocks. also are they both female if you dont know you can tell by what looks to be a small tail. if they are indeed both female then chances are the red bump is most likely from a fight for these frogs are very territorial. however mine usually just squeeze each other untill i break it up. i hope my info was helpful and i hope you find your frog and he is okay

 

[ncspuppy]

I found the missing frog last night. I was feeding the tank and then I saw two frogs. I was so surprised, because I thought the frog had died and alread decomposed. I had removed all the decorations from the tank, and thought I had completely looked through the tank. Apparently I must have missed a spot. I cleaned out the tank yesterday, so maybe he came up out of the gravel when I was vacuuming it.

I'm going to try to see if I can sex them. I assumed the fatter one was female, but maybe I should find another way to sex besides size. I asked this on another forum and the answer I got was that they do not burrow and if I do not see the frog anywhere then most likely it had already decomposed. And that the frog was most likely attacked by a fish. And that frogs and fish should not be kept together.

So if 2 frogs together will fight, and other fish will bite them, how is it best to keep these guys?

Here's some images of the hurt frog:

If you can tell the sex from the picture, can you tell me please?