Answer:
In the deepest part of the lake.
Step-by-step explanation:
Fossilization is a rare process in which a plant or animal is transformed into a fossil. It is a complex process with several stages beginning from burial to concluding with their discovery as a fossil. In the case of dead fish, the most likely chances of it being fossilized would be in the deepest part of the lake as it would provide an "Anoxic"(low oxygen) atmosphere to the fish that would help prevent it from decaying or decomposing. It would be buried down by the sediments and form imprints of theirs on the surface of the sea without any intervention by the other sea creatures.