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Photoblepharon palpebratum in the dark. The eyelight fish is a small, dark fish, with a relatively stout body for an anomalopid. It has a blunt snout, large eyes, and prominent subocular light organs. It has a single dorsal fin and no adipose fins. It has 2–3 dorsal spines, 16–20 dorsal rays, 2 anal spines, and 13–15 anal soft rays.
This light is then reflected out through the photophore aperture, where it passes through a brown filter, yielding a far-red light with a maximum absorbance at 708 nm (almost infrared). In live fish, the suborbital and postorbital photophores both flash vigorously, the suborbital at a slower rate.
Pachystomias is one of three deep-sea fish that can produce red light bioluminescence, along with Aristostomias and Malacosteus.In addition to producing blue light via postorbital photophores, Pachystomias also possess suborbital and preorbital cephalic photophores that are capable of producing far-red bioluminescence, with wavelength emissions of over 650 nm. [1]
A shed carapace of a lady crab, part of the hard exoskeleton. Body structure of a typical crustacean – krill. The body of a crustacean is composed of segments, which are grouped into three regions: the cephalon or head, [5] the pereon or thorax, [6] and the pleon or abdomen. [7] The head and thorax may be fused together to form a ...
The spawn of the anglerfish of the genus Lophius consists of a thin sheet of transparent gelatinous material 25 cm (10 in) wide and greater than 10 m (33 ft) long. [39] Such an egg sheet is rare among fish. The eggs in this sheet are in a single layer, each in its own cavity. The spawn is free in the sea.
Fish anatomy. Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. [1] In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or ...
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