Domestic cats prey on many birds.
Asian lungworms / Raillietiella orientalis are small worms that make hosts of many animals, most commonly ones in the pet trade.
Panthers and Burmese pythons compete over many of the same prey.
Oysters take shelter in the red mangrove (Rhizophora mangle), and the red mangrove doesn’t benefit.
Wading birds (such as egrets) nest near alligators, as the alligators keep the racoons and other similar animals away. The birds’ guano contains many nutrients that attract prey for the alligator, thus making it mutualism.