How to Buy Seafood Cheap?

[Brexit]

I've been eating a lot of chicken lately as I usually only eat turkey and beef occasionally and pork even more rarely. I'm looking in to breaking up the chicken and trying some fish or seafood, but I have a really tight budget for food and can't be spending tons of money. I live on the east coast, so fish is usually good quality but pricey (also I kind of hate shrimp).

Any ideas?