What is hydromedusae?

medusa
Definition of hydromedusa : a medusa (as of the orders Anthomedusae and Leptomedusae) produced as a bud from a hydroid.

How do hydromedusae differ from Scyphomedusae?

In general, hydromedusae are small, and either transparent or lightly pigmented, although some of the deep sea species are deeply colored – usually some version of dark red. (Scyphomedusae, in contrast, are usually large and often highly pigmented and are what most people think of when jellyfish are mentioned.)

Where are Hydrozoa found?

Most hydrozoans are marine, and hydrozoan species are found in nearly every marine habitat type; a very few species live in freshwater. Most hydrozoans form colonies of asexual polyps and free-swimming sexual medusae. Colonies are usually benthic, but some, notably the siphonophores, are pelagic floaters.

What are some differences between Scyphozoans and Cubozoans?

Cubozoans differ from Scyphozoans in their arrangement of tentacles; they are also known for their box-shaped medusa. Out of all cnidarians, cubozoans are the most venomous.

Is a Hydromedusa a jellyfish?

Hydromedusae are the medusae stage of Hydroids classified under the Cnidarian Class Hydrozoa. Unlike the Scyphoszoans or “true jellyfish”, such as moon (Aurelia aurita) or lion’s mane (Cyanea capillata) jellyfish, you are unlikely to spot hydromedusae swimming about as these are tiny, often microscopic, jellyfish.

What are hydroids predators?

Hydroids are a life stage for most animals of the class Hydrozoa, small predators related to jellyfish. Some hydroids such as the freshwater Hydra are solitary, with the polyp attached directly to the substrate. When these produce buds, they become detached and grow on as new individuals.

What are the hydromedusae?

The Hydromedusae form a widespread, dominant and highly differentiated group of animals, typically marine, and found in all seas and in all zones of marine life. Fresh-water forms, however, are also known, very few as regards species or genera, but often extremely abundant as individuals.

How do hydromedusae reproduce?

As already stated, there occur in the Hydromedusae two distinct types of person, the polyp and the medusa; and either of them is capable of non-sexual reproduction by budding, a process which may lead to the formation of colonies, composed of more or fewer individuals combined and connected together.

Are all hydromedusae bioluminescent?

Many species of hydromedusae (as well as siphonophores, scyphomedusae, ctenophores and many other kinds of marine organisms) are bioluminescent. Such bioluminescence does not appear as an all-over glow, but is typically localized in a species- or genus-specific pattern.