I guess this means we need to compare two games, one with seahorse and one without it. aaand it needs to be without Magic fishes and plants to make it clearer? I finished PT several times before but i don't remember finishing FT at all. so i may try it again and maybe solve the mystery?

I also want to point it out for everyone that Fish Tycoon for PC is totally free, so you may also try it immediately http://lastdayofwork.com/fish_tycoon.php