Here's my design of a Dead Fish Remover.
Now, you too can build a Dead Fish Remover.
All you need is a stainless steel rod, a hard plastic tube, and a high speed twist drill.
Dead Fish Remover (Up Close)
A. Bulge slightly catches dead fish's corpse
B. Space accommodates different size fish corpses
C. Groves catch fish corpses that can't be poked (because it's either too hard or too soft) by nudging the corpse against the tank's glass and lifting to the top which can then be easily picked out by hand.