Double anglers are a family, Diceratiidae, of anglerfishes. They are found in deep, lightless waters of the Atlantic, Indian and western Pacific Oceans.[1]
They are easily distinguished from other anglerfishes by their possession of a second light-bearing dorsal fin spine immediately behind the illicium (the bioluminescent lure present in other anglerfishes).
As in other anglerfishes, the male is very much smaller than the female, and after a larval and adolescent free-living stage, spends the rest of his life parasitically attached to a female.
Species in this family are known almost entirely from adolescent females; only two larvae, one adult female, and one adult male have been found.[2]
One of the first specimens of the two-rod anglerfish (first called Ceratias bispinosus) was collected during the expedition of HMS Challenger during 1873–1876. It was first described by Albert Günther in 1887 in volume 22 of "Report on the deep-sea fishes collected by H. M. S. Challenger during the years 1873–76. Report on the Scientific Results of the Voyage of ADD" [3]
^Froese, Rainer, and Daniel Pauly, eds. (2006). "Diceratiidae" in FishBase. February 2006 version.
^Theodore W. Pietsch (2005). "Diceratiidae". Tree of Life web project. Retrieved 4 April 2006.
^Günther, Albert C. L. G. (Albert Carl Ludwig Gotthilf) (1887). Report on the deep-sea fishes collected by H.M.S. Challenger during the years 1873-1876. Smithsonian Libraries. London.
Doubleanglers are a family, Diceratiidae, of anglerfishes. They are found in deep, lightless waters of the Atlantic, Indian and western Pacific Oceans...
Weisstein, Eric W. "Half-Angle Formulas". MathWorld. Abramowitz and Stegun, p. 72, 4.3.24–26 Weisstein, Eric W. "Double-Angle Formulas". MathWorld. Abramowitz...
magazines, newspapers, laws, etc. When nested, single angle brackets are used inside doubleangle brackets. With some exceptions, this usage parallels...
morphophonemic rather than phonemic representation. Other conventions are double slashes (⫽ ⫽), double pipes (‖ ‖) and curly brackets ({ }). In lexicography, square...
Diceratias bispinosus, commonly known as the two-rod angler, is a species of doubleangler, a type of anglerfish. The fish is bathypelagic and has been...
Diceratias trilobus is a species of doubleangler, a type of anglerfish. The fish is bathypelagic and has been found as deep as 1,216 metres (3,990 ft)...
International added the American angler (Lophius americanus), the angler (Lophius piscatorius), and the black-bellied angler (Lophius budegassa) to its seafood...
geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed...
« LEFT-POINTING DOUBLEANGLE QUOTATION MARK U+00BB » RIGHT-POINTING DOUBLEANGLE QUOTATION MARK U+2039 ‹ SINGLE LEFT-POINTING ANGLE QUOTATION MARK U+203A...
Bufoceratias shaoi is a species of doubleangler, a type of anglerfish. The fish is bathypelagic and has been found at depths ranging from 0 to 1,200...
within math.h: sin(double), sinf(float), and sinl(long double). The parameter of each is a floating point value, specifying the angle in radians. Each function...
e^{i2\varphi }=(\cos \varphi +i\sin \varphi )^{2}} But replacing the angle with its doubled version, which achieves the same result in the left side of the...
at least the 12th century scribes also began entering diples (sometimes double) within the column of text. The amount of printed material and its readership...
− 1 , {\displaystyle \csc \theta -1,} the exsecant of the complementary angle, though it was not used in practice. While the exsecant has occasionally...
Diceratias is a genus of doubleanglers with three recognized species as of 2012: Diceratias bispinosus Günther, 1887 (Two-rod anglerfish) Diceratias pileatus...
The double bass (/ˈdʌbəl beɪs/), also known as the upright bass, the acoustic bass, or simply the bass (/beɪs/), is the largest and lowest-pitched chordophone...
Bufoceratias thele is a species of doubleangler, a type of anglerfish. The fish is bathypelagic and has been found at depths ranging from 0 to 1,500...
parameters as camber angle, caster angle, toe pattern, roll center height, scrub radius, scuff (mechanical abrasion), and more. The double-wishbone suspension...
circular sector minus the area of the triangular portion (using the doubleangle formula to get an equation in terms of θ {\displaystyle \theta } ): a...
Diceratias pileatus is a species of doubleangler, a type of anglerfish. The fish is bathypelagic and has been found at depths ranging from 640 to 1,430...
The angle of repose, or critical angle of repose, of a granular material is the steepest angle of descent or dip relative to the horizontal plane on which...
the doubleangle method, the phase map method uses two images; however, this method relies on the accrual of phase to determine the real flip angle of...
2cos2(54°), and CQ = 1 − 2cos2(54°), which equals −cos(108°) by the cosine doubleangle formula. This is the cosine of 72°, which equals ( 5 − 1 ) / 4 {\displaystyle...
uses fullwidth doubleangle brackets 《...》 (U+300A LEFT DOUBLEANGLE BRACKET, U+300B RIGHT DOUBLEANGLE BRACKET), and fullwidth single angle brackets, 〈...
1989. Gary Martin. "Double Dutch". Phrases.org.uk. Retrieved 2 February 2024. Nashville Film Institute (10 October 2020). "Dutch Angle Shot: Everything You...
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