............The answers aren’t definitive, but some research indicates that the frogs may benefit from these unique living arrangements in the form of protection and food. The relatively large spiders could be serving as a sort of bodyguard for the helpless amphibians, protecting them from snakes and other predators. Additionally, the frogs may eat the small invertebrates attracted to the spider’s prey remains.
In this case, their relationship would be a kind of commensal symbiosis where one party (the frog) benefits, but the other (the tarantula) isn’t affected either way. But the spider-frog relationship could also be an example of mutualism, with both benefiting in some way.
Remember those small invertebrates that are attracted to the remains of the spider’s prey? Well, they can also target the spider’s eggs — unless the frogs wipe them out first.