I'd need to see some documentation. There's no way fish fossils would have been "scattered around" unless someone had placed them there recently. Sitting on the surface, they would have disappeared a long time ago just from the weather.
Also, fossilization takes at least 10,000 years, and the flood was supposedly only 5000 years ago. Also, fossilization occurs during subsidence, not uplifting which created the Himalayas. So I'm calling BS on this story.
Since you're an expert on the flood, can you explain what happened to the plants? "Noah was six hundred years old when the floodwaters came on the earth. And Noah and his sons and his wife and his sons’ wives entered the ark to escape the waters of the flood. Pairs of clean and unclean animals, of birds and of all creatures that move along the ground, male and female, came to Noah and entered the ark, as God had commanded Noah." Genesis 7:6-9
It also says "Every living thing on the face of the earth was wiped out; people and animals and the creatures that move along the ground and the birds were wiped from the earth. Only Noah was left, and those with him in the ark. The waters flooded the earth for a hundred and fifty days." Genesis 7:23-24
Plants are alive, so "every living thing" includes them. And few if any land plants can survive 150 days underwater. That would kill many seeds as well, especially since it was brackish as it would have been a mixture of rain and seawater.
To answer this, you have to gin up an explanation outside of the text. Or, you have to accept that this is a made-up story and the writer simply forgot to include plants.
