The fishing trap is not a craftable recipe in this modpack. (once i read your comment i immedeatly tried to go and craft it, and it does not show in the NEI or does not work on the crafting table.)@Falchonbria you can get "shrimps" fishing, or with a fish trap.
Also, from experience, i've never fished up any of those food items in this modpack (the turtle, shrimp, clam, etc.) only fish.
I first found out about this back in july i belive and i checked the wiki and it didnt have any other ways to get these items. I guess the mods could have been updated since, but as far as this modpack, version 1.2.1 cannot get those items except from the water gardens from what i'm understanding. Unless you have to fish in a special biome or something, but back when i first looked at the wiki there were not any other ways to find them (or rather there was no other information about them).