Chop vegetables into small, bite-sized pieces. Rinse fish fillets and remove any bones.
Place carrots, green beans, zucchini, and brown rice in the crockpot first.
Lay fish fillets on top of vegetables, then add pumpkin puree.
Pour water or bone broth slowly into the crockpot. Drizzle olive oil on top.
Set crockpot to low for 5-6 hours or high for 3-4 hours.
Once cooked, stir gently with a wooden spoon to break apart fish and mix evenly.
Allow food to cool completely before serving. Store leftovers in airtight containers in the refrigerator for up to 4 days or freeze for up to 2 months.