Peel and devein the shrimp, then chop into bite-sized pieces. Dice the onion, celery, and potato into uniform small cubes.
In a large pot over medium heat, melt the ghee. Add the diced onion and celery, sautéing until the vegetables are translucent and fragrant.
Stir in the diced potatoes, clam juice, sea salt, black pepper, dried thyme, and the bay leaf. Bring the mixture to a gentle boil.
Reduce the heat to low, cover the pot, and simmer for 10-12 minutes, or until the potatoes are fork-tender.
Add the chopped shrimp and the drained canned clams to the pot. Cook for 3-4 minutes until the shrimp are pink and opaque.
Stir in the almond milk and heat through for 1 minute, being careful not to let the soup boil once the milk is added.
Remove the pot from the heat and discard the bay leaf. Whisk in the Greek yogurt until the broth is creamy and well combined.
Ladle the chowder into bowls and serve immediately.