Dead Pleco, Mystery Cocoon!

[Padawan]

I was curious if someone could help me.( I will provide pictures to help explain)

Im not too aware of the diseases tropical fish can develop so was wondering if someone could help explain what has happened to my Pleco. I noticed that it had been missing so after being unable to locate it I lifted out the large cave ornament to find it had been floating at the top, now covered in a strange translucent slime. It had a few days previous been acting strange, sudden jumping swims to the surface, and doing a strange rapid motion at the top, then floating back down. repeatedly, but then it stopped after that day.

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Not much has changed recently withing my tank, but i am unsure of my water ph levels and such to help pinpoint the cause. My Siamese fighter has recently attempted a bubble nest, could this of effected anything? The tank contained only 1 siamese fighter, 1 pleco and 5 neon tetra. The siamese fighter did take a few chunks out of the slime too...

Some images to show the pleco. The tank is not unclean, the flakes are just before the pictures were taken.

Overview of tank, bubble nest by siamese fighter on right.


Slime cocoon


Cave found in the top of


I know this problem may be common knowledge to some, but i have no idea what this is and thank anyone for the help.

 

[fluttermoth]

The 'slime cocoon' is just a fungus that grows very rapidly on dead fish in the warm temperatures of a tropical tank. It won't be related to why the fish died.

The betta's bubble nest won't have caused any problems

To pinpoint that we'd need to know more about your set up; how big is your tank, how long it's been set up, your maintenance regime and the results of any water tests you have (some shops will test your water for you, either free or for a small charge, although I'd recommend that all fishkeepers keep a set of good, liquid based test kits as an essential item).

 

[mattyeatsmatts]

the amount of food looks a little much