Other pests include caterpillars, thrips, slugs and snails. Slugs and snails also eat cacti. Some slugs are predators and eat other slugs and snails, or earthworms. Slugs and snails feed on the foliage. Defensive ammunition such as buckshot, slugs and combination loads are common. It eats prey such as beetles, millipedes, and slugs. Other than that there is little morphological difference between slugs and snails. A prostate gland also occurs in some invertebrate species, such as gastropods (slugs and snails). Moreover, protection must be provided against slugs and snails which attack the ripe fruit. Some colubrid snakes are known predators of slugs. Seedlings are susceptible to fungal infection and predation by banana slugs, bush rabbits, and nematodes. Both cephalopods and banana slugs are molluscs. Sea urchins, "Dotidae" and sea slugs eat seaweed. Young frogfish often mimic the coloration of poisonous sea slugs or flatworms. These results and conclusions were confirmed by a similar study on slugs and snails.