In a large pot over medium heat, heat coconut oil.
To the pot, add the onion and peppers.
Sauté for 10 minutes until onion is caramelized and peppers are tender.
To the pot, add the remaining 8 ingredients (tomatoes through thyme) and stir. Reduce heat to low and cover.
Simmer for 25 minutes, until fish is tender and flakes easily with a fork. Remove thyme and serve warm.