You might look at recipes for fish cake. Run the fish through a food processor and mix in some cooked rice to help bind it. The add some things like green onion, jalapenos, bell peppers, finely diced celery, garlic and some seasonings to taste.
Spread the mixture onto parchment paper and roll into logs a few inches long. Tie with butcher's twine, and let sit in fridge overnight. Then put the wrapped logs in a large covered pot with .5" to .75" of water, and steam for 20mins.
You can also add some peeled shrimp or diced calamari squid to the fish mix before chopping it in the processor.