yup looks like a hog choker
ive caught many and had no luck with them.
hope you have better luck.
neat fish in a sand tank.few pics in one of my netting threads too.
I've raised them to more than 10" on a diet of live black worms and Daphnia magna. Once they get really big they start wanting to breed and they need salt water to do that. Mine jumped out of the tank after three years of eating every living thing they could stuff into their mouths. Great little preditors