Is that like a "glass cat"?
A vacuum cleaner for the tank?
No, he was more like a real shark, he ate my mollies, the snails, and anything else bite sized.
He'd roll on his side, roll his eyes backwards, and franzy around the surface when I put fish food in the tank.
He was more like the red tail sharks, but with long catfish like feelers off their mugs.
And he ate everything.
We had to give him back to the pet store.
The proprietor punished him buy sticking him in with stuff bigger than him so he couldn't eat them.