To me personally...there's no limit what you can do with a "seafood / fish" chowder.
2 basic sauce types....creamy or tomato...various types of fishy stuff
add whatever else you feel like adding.
Also VERY similar to gumbo in the sense that there are really no exact SET of ingredients...just a mixture of fishy stuff...starch (noodles / potatoes etc..)...veggies...seasonings.
Fairly easy to make...and TRULY tasty