Homemade beer batter is easy or you can buy the box mix batter and just add beer. I use this recipe.
mix in a large bowl:
2 eggs
1 3/4 cup flour
1 tsp baking soda
2 tsp baking powder
2 tbsp cooking oil
2 tsp seasoned salt
1 tsp black pepper
1 1/2 cup beer
use a little less flour for thinner batter or less beer for thicker batter. For beer I use Alaskan Amber, similar to Killian's Red or Leinie's Red.
cut the halibut into finger food size chunks, dip in batter and fry in hot cooking oil until golden brown.
good for onion rings too!