In the food chain 'Seaweed -- Snail -- Fish -- Dolphin', what trophic level do snails belong to?

In the food chain 'Seaweed -- Snail -- Fish -- Dolphin', snails are classified as primary consumers. This classification is attributed to their role in the food chain where they directly feed on producers, in this case, seaweed.

Primary consumers are typically herbivores that consume plants or algae to obtain their energy. Since snails feed on seaweed, they occupy the second trophic level in this chain. The producers, which in this scenario are the seaweeds, form the first trophic level, and organisms like fish that consume snails are secondary consumers, thereby placing snails firmly in the primary consumer category.