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Some box jellyfish species' eyes appear to have evolved more focused vision in response to their habitat. [50] Pupillary contraction appears to have evolved in response to variation in the light environment across ecological niches across three species of box jellyfish (Chironex fleckeri, Chiropsella bronzie, and Carukia barnesi).
The apparent "eye color" in these animals is red or black. [4] Certain groups such as box jellyfish have more complex eyes, including some with a distinct retina, lens, and cornea. [5] Many snails and slugs also have ocelli, either at the tips or bases of their tentacles. [6] Some other gastropods, such as the Strombidae, have much more ...
Each rhopalium carries six eyes of four morphological types (lower lens eye LLE, upper lens eye ULE, pit eye PE and slit eye SE) and a light sensitive neuropil (NP, red broken line). The eyes are responsible for the image formation in the animal and the light sensitive neuropil is thought to be involved in diurnal activity".
The fish's species was, at first, hard to identify because it appeared to have no eyes, mouth, tentacles, front or back. ... Scientists don't know how or why this particular jellyfish ended up in ...
The box jellyfish actively hunts its prey (small fish), rather than drifting as do true jellyfish. They are strong swimmers, capable of achieving speeds of up to 1.5 to 2 metres per second or about 4 knots (7.4 km/h; 4.6 mph). [19] and rapidly turning up to 180° in a few bell contractions. [4] Some species are capable of avoiding obstacles. [4]
However, the agile box jellyfish are unique among Medusae because they possess four kinds of true eyes that have retinas, corneas and lenses. [25] Although the eyes probably do not form images, Cubozoa can clearly distinguish the direction from which light is coming as well as negotiate around solid-colored objects. [11] [25]
“Diagnosing jellyfish stings generally doesn’t require a visit to a health care provider. If you do go, your provider will likely be able to diagnose your injury by looking at it,” reported ...
In common with other box jellyfish, C. fleckeri has four eye-clusters with 24 eyes. Some of these eyes seem capable of forming images, but whether they exhibit any object recognition or object tracking is debated; it is also unknown how they process information from their sense of touch and eye-like light-detecting structures due to their lack ...