The mushrooms aren't toxic but the red efts certainly are!
On two separate occasions,
I witnessed an Eastern newt do something
which I have never heard of from anywhere else.
The newt had a minnow in a bear hug.
They were lined up belly to belly, head to head, tail to tail.
They were about the same size.
The newt was doing alligator roles with the fish near the surface of the pond.
Even though I was very interested,
it took too long for me to stick around and see how it ended.
My hypothesis is that the newt was poisoning the fish.