That depends on what you mean by Grass and what you mean by sea slug.
Generaly speaking,
If you mean weather nudibranches can eat terrestrial grass then the answer is no.
Nudibranches Are almost always obligate predators on specific species of Corals or other invertibrates, meaning they only eat one specific animal alone and nothing else.
Their is however a clade of sea slugs called the Sacoglossans which
Feed on plant material. these animals eat Various forms micro and macro algae.
They are known to assimilate the chloroplasts of Algae cells into into their bodies in a phenomina known as Kleptoplasty, this allows them effectively become photosynthetic so long as they can continue to assimilate fresh chloroplasts. "solar powered sea slugs"
These slugs are not known to feed on grass though.
No, slugs are considered molluscs (like the octopus and the snail). "Bugs" generally refers to insects such as flies.
no slugs eat dead plants and alive plants
Slugs, snails and caterpillars
They eat grass and sea slugs eat seaweed.
They eat mice ,slugs, and small insects.
grass and leaves
moles eat them. they also eat slugs and the larve state of June bugs
bugs and grass
Yes they do, Roly Polys eat plants like Leaves and grass.
grass and small bugs.
No
No, catfish will eat other fish, shrimp, water bugs, but no grass
no, they swarm and eat small bugs like slugs, bees, and grasshoppers.
they are found in wet grass and in flowers because they love to eat them