|Krøyer's deep sea angler fish, Ceratias holboelli|
T. N. Gill, 1861
They are among the most widespread of the anglerfishes, found in all oceans from the tropics to the Antarctic. They are large and elongated: females of the largest species, Krøyer's deep sea angler fish, Ceratias holboelli, reach 1.2 m (3.9 ft) in length. Males, by contrast, are much smaller, reaching 14 cm (5.5 in), and, like other anglerfishes, spend much of their lives attached to a female after a free-living adolescent stage in which they are very small - at most 1.3 cm (0.51 in) - and have sharp, beak-like, toothless jaws. One or more males attach themselves permanently to a female, eventually merging circulatory systems. As this genetic chimera matures, the male grows large testicles, while the rest of its body atrophies. Ceratioidea are the only creatures known to become chimeras as a normal part of their lifecycle.
- Froese, Rainer, and Daniel Pauly, eds. (2006). "Ceratiidae" in FishBase. February 2006 version.
- Theodore W. Pietsch. "Ceratiidae". Tree of Life. Retrieved 3 April 2006.
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