This has been happening every night, I even dangled the worm in the tank with my fingers(above water). The worms can't do anymore, they wiggle, they climb over him and almost put theirselves in his mouth
I would really appreciate some suggestions as to what to do, as not sure if a diet of just shrimps is healthy for him.

I cut it into 4 pieces and was waving 1 about with the feeding tong, only took him a couple of minutes before striking. Am gonna leave worms for a while as maybe he just doesn't like them 