The recipes that combine a knife and fish to get raw fillets are unable to be removed by crafttweaker.
removing all recipes from the crafting table leaves these recipes
removing by input of the knife or the fish leaves these recipes, removing by output of the fillets leaves these recipes
there's a config that disables them, but I thought I should mention those recipes are oddly not working with crafttweaker.

there is not a config that removes jellyfish and leeches from brewing potions, and they have the same functionality issue with craftweaker, nothing CT can do to let me disable jellyfish and leeches from being viable brewing ingredients.

The fish fillet recipes showing in JEI is a custom implemantation of getting them to show at all, CraftTweaker will never be able to tweak that in any way, which is why there is a config.

As for the brewing recipes, they're being added in the standard way, that any new brewing recipe would. I'm not familiar with how CraftTweaker removes brewing recipes, or if it can at all.
How you been able to remove brewing recipes from other mods without issues?

craft tweaker let me use the aquaculture turtles to brew a potion of turtle master and remove all other recipes for mundane potion ( only leech and jellyfish make a mundane potion in my modpack right now, no other ingredients do, that's what i want to remove) ill test removing a potion from another mod, but I'll have to find one to install first, standby

Edit: not sure why removing all sources for mundane potions didn't work, but I did find that removing by input worked this time, not sure why it didn't work last time.

So i guess, issue resolved. thanks for your time.