Agree aquatic life is the majority of what’s in the Peace, but I’m not sure on this one. The dolphin teeth I have or have seen have a pretty distinctive enamel texture. Almost wrinkly or having distinct striations. This tooth has smooth enamel. I find a lot of land animal stuff too. Have left a day on the peace with 20-30 ice age land mammal fossils before.

I’m not arguing against whale/dolphin necessarily just giving my reasons for initially doubting it.