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A cnidocyte (also known as a cnidoblast) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida (pl.: cnidae)) that can deliver a sting to other organisms. The presence of this cell defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Cnidae are used to capture prey and as ...
Rhopilema verrilli, the mushroom cap jellyfish, is a species of jellyfish in the family Rhizostomatidae. They are cnidarian invertebrates distinguished by their mushroom-shaped medusae. The species does not have any tentacles; however, they still have stinging cells, called nematocysts , within their bells, which can produce mild stings to humans.
Jellyfish reproduce sexually. Males release sperm through their mouth into the water column and this is received into the female's mouth, where fertilization occurs. Development occurs quickly, as the lifespan of a jellyfish is only a few months. The eggs develop either inside the female, or in brood pouches located on the oral arms.
The upper surfaces of these arms are covered in stinging cells called cnidocytes. [5] Unlike many other jellies, spotted jellyfish have numerous mouths along the bottom of their oral arms. There are eight rhopalia, which act as the sensory organs of the jellyfish, on the margin of the bell. [5]
Carybdea marsupialis is a small transparent jellyfish with a box-shaped bell [2] about 3 cm (1 in) across, at the four lower corners of which are four elongated tentacles up to 30 cm (12 in) long. The bell has a number of small white or yellowish warts with stinging cells, and near the margin, equidistant from the tentacles, are four rhopalia ...
New Jersey is known for its beautiful sandy beaches and fun boardwalks, but a painful predator is common in this summertime paradise. Stinging jellyfish have made homes of the Jersey Shore, its ...
The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism. [3] Scyphozoans have existed from the earliest Cambrian to the ...
Worried about getting stung by a jellyfish at the beach? Here's how to navigate the worst-case scenario. Skip to main content. Subscriptions; Animals. Business. Fitness. Food. Games. Health. Home ...