They sound like what we Brits call "fishcakes" or "fish cakes". Wikipedia tells us:

A fishcake (sometimes written as fish cake) is a food item similar to a croquette, consisting of filleted fish or other seafood with potato patty, sometimes coated in breadcrumbs or batter, and fried.

Fishcakes as defined in the Oxford Dictionary of Food and Nutrition are Chopped or Minced Fish mixed with Potato, Egg and Flour with seasonings of onions, peppers and sometimes herbs.[1]

The fishcake has been seen as a way of using up leftovers that might otherwise be thrown away. In Mrs Beeton's 19th century publication Book of Household Management, her recipe for fishcakes calls for "leftover fish" and "cold potatoes." More modern recipes have added to the dish, suggesting ingredients such as smoked salmon and vegetables.

Here's a recipe for a rather upmarket version you can make yourself.