I'd like to subscribe to your newsletter.Mollusks and organ meants can work. They happen to contain nutrients that a usually associated with plants, such as vitamins B9, C, and E.
The rest of land carnivores would agree about organ meats. They happen to eat those things first and only out of their dead prey.
The substitution is in the micronutrients rather than the outward "taste and texture".Why not just call it meat?