description Polyorchis penicillatus Overview
Polyorchis penicillatus is a hydromedusa, the jellyfish-form stage of a hydrozoan, found in coastal waters of the northeastern Pacific from the Aleutian Islands to the Gulf of California. It is also called the red-eyed medusa because of the red-rimmed ocelli at the bases of its tentacles. The species commonly lives in shallow bays and eelgrass beds, remaining near the seafloor by day and moving higher in the water at night to feed.
help Polyorchis penicillatus FAQ
What is Polyorchis penicillatus?
Polyorchis penicillatus is a hydromedusa, the jellyfish-form stage of a hydrozoan. It is also called the red-eyed medusa because of its red-rimmed ocelli.
Where is Polyorchis penicillatus found?
It occurs in coastal waters of the northeastern Pacific. Its reported range extends from the Aleutian Islands to the Gulf of California.
Why is Polyorchis penicillatus called the red-eyed medusa?
The name refers to its red-rimmed ocelli, which are light-sensing structures at the bases of its tentacles. The species is therefore identifiable by a feature near its tentacle bases.
Is Polyorchis penicillatus a scyphozoan jellyfish?
No. It is a hydromedusa, meaning it is the jellyfish-form stage of a hydrozoan rather than a scyphozoan true jellyfish.
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