I believe they are called ocelli (ocellus for singular use)

The aurelia's ocellus, also known as the light-sensing organ, is used to detect changes in light intensity. This helps the jellyfish navigate its surroundings and can also be used to avoid predators or capture prey.

ocelli is the name for the eyes on the birds feathers it is rather called ocellious but the short form is ocelli

Eye in latin is: Oculus, it's plural form is: Oculi.

Ocelli are located at the margin of the bell, often contained in sensory structures called rhopales. In some species, such as Polyorchis penicillatus, there is one ocellus per tentacle (visible as a small red dot).