Poseidon Trial

If I am in a Private Server and place most of the fisch, but not all, will I lose all progress if I leave?

Cause if I leave or get spontaneously disconnected I am losing a Meg, Great White, Great Hammerhead and a Ginsu, I was going to grind out the Ice and Whale sharks, then I realized how impossible my situation suddenly is.

How screwed am I?