It's a little tricky to answer who "eats" algae because it depends on what you mean by "eat." Here's a breakdown:

Directly Consuming Algae:

* Humans: We do consume algae directly, most notably in the form of seaweed. Many types of seaweed are used in various cuisines around the world, and some are even cultivated for their nutritional value.

* Herbivorous Animals: Some herbivorous animals, like sea turtles, sea urchins, and certain fish, directly graze on algae.

* Filter Feeders: Creatures like oysters, clams, and some types of whales filter algae from the water as part of their diet.

Indirectly Consuming Algae:

* Almost All Animals (including humans): Since algae are the base of the food chain in many aquatic ecosystems, almost all animals indirectly consume algae by eating creatures that have consumed algae themselves. For example, a fish that eats a shrimp, which ate algae, would be indirectly consuming algae.

Important Note: While some algae are safe for consumption, others can be toxic. It's crucial to understand which types of algae are edible and to ensure proper preparation to avoid harmful effects.

Let me know if you'd like to know more about a specific type of algae or its consumers!