Cnidaria is a phylum of species known for their cnidocyte

Cnidaria is a phylum of species known for their cnidocyte -...

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The Cubozoa Jellyfish By Garrett Koos Cnidarians are a phylum of species known for their cnidocyte, cnidoblast, or nematocyte cells that allow them to defend themselves and catch prey. The cnidocyte, cnidoblast, and nematocyte are a unique venomous cell that is more commonly known as the jellyfish sting. Included in the Cnidarians phylum is the medusozoa, or the jellyfish, which is further broken into four groups of jellyfish, the cubozoa, hydrozoa, scyphozoa, and the staurozoa. The cubozoa jellyfish,
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which is also known as the sea wasp or the box jellyfish, is the most deadly of all the jellyfish. They have a unique anatomy, a deadly sting that if not treated immediately can result in death, and live close to popular beaches. The cubozoa jellyfish, which isn’t actually considered a fish, but is actually an invertebrate very similar to coral. The cubozoa jellyfish is unique in its cubed shape medusae, or bell. The cubozoa jellyfish size ranges from thimble sized bells, up to a bell of 2.5 meters in diameter, and tentacles as long as 60 meters. These jellyfish can way as much as 550 pounds. The cubozoa is made up of 95% water, and lacks a heart, a brain, and bones. While most jellyfish lack eyes as well, the cubozoa jellyfish is unique in that it has a sensory club, known as the rhopalium, which has evolved into a cluster of different eyes that typically in jellyfish can only distinguish light from dark. Because of the cubozoa jellyfish eye actually consisting of a retina, corneas, and lenses, it can see specific points of light. However, it is unclear how this is used because the cubozoa still doesn’t have a brain. Under the bell, the cubozoa has a velarium, or a flap that can increase the flow of water pushed out of the bell. The cubozoa differs from most other jellyfish with its more advanced nervous system including a nerve ring
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This note was uploaded on 11/14/2011 for the course SCIENCE 101 taught by Professor Teacher during the Spring '11 term at Las Positas College.

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Cnidaria is a phylum of species known for their cnidocyte -...

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