高中英語作文：五顏六色的珊瑚礁(Colorful coral reefs)
在學習、工作乃至生活中，大家都寫過作文吧，根據寫作命題的特點，作文可以分為命題作文和非命題作文。相信很多朋友都對寫作文感到非常苦惱吧，以下是小編為大家整理的高中英語作文：五顏六色的.珊瑚礁(Colorful coral reefs)，希望能夠幫助到大家。
gaze at the vivid yellows, blues, and psychedelic swirls of a single emperor angelfish and youll sense the whimsy of evolution. go on to eplore its home in lush coral reefs and youll soon hit sensory overload, assaulted by colors and patterns that range from sublime to garish. coral reefs are unquestionably the worlds most colorful places. but why?
for reasons known only to nature, color eplodes across coral reefs, making them earths most vivid landscapes. here in the shallows of a fijian reef, brilliant soft corals wave in reds, pinks, and yellows as schools of fairy basslets flash orange and violet hues. the basslets different colors aid in species identification, mate recognition, and even camouflage as individuals mass against the kaleidoscope of the reef. what humans see lighted by a photographers bright strobe may look altogether different in natural light through the eyes of reef creatures. scientists are now beginning to learn how wavelengths of light (and therefore color) change through water at different distances, and—more important—how fish see colors and what messages they might communicate.
bold horizontal bands of black, white, and yellow pop out on a well-lighted sweetlips (plectorhinchus polytaenia) in indonesia. the pattern and colors actually help distort the fishs outline when seen in natural light at a distance through water, helping the animal disappear from the view of potential predators. nearby, a neon cleaner wrasse also wears stark stripes. these little fish eat parasites off the flesh and mouths of other fish. the wrasses stripes may signal that it is a useful helper rather than a ready meal. neon wrasses vary in coloration geographically. a yellow cast near the head (as shown here) indicates an indonesian species; in fiji many neon wrasses have a yellow blaze near the tail.
the pacific blue tang (paracanthurus hepatus)—also known as the artists pallette surgeonfish due to the shape of the dark patch on its body—was immortalized by the character dory in the film finding nemo. unlike that benignly daft creature, this real-life surgeonfish in indonesia carries a sharp retractable blade of bone near the base of its tail. the tails yellow blaze gives potential foes fair warning: armed and dangerous.
a leaf scorpionfish (taenianotus triacanthus) scouts for errant fairy basslets in fijian waters. this ambush predator can change its color to blend with its surroundings. it then lies still, waiting for prey to pass by. "we saw this fish pounce a couple of times," says photographer tim laman. "his mouth shot out and back in a fraction of a second."
a crescent-tailed bigeye (priacanthus hamrur) seems to wear its emotions on its sleeve—or on its whole body. this sequence of three frames of the same fish shows how it can change from largely silver to striped to solid orange-red, a transformation that occurs in a matter of seconds. pigment cells in its skin, called chromatophores, allow it to change color, but scientists dont yet know what each color pattern signifies. sometimes a sudden shift in color can be used to startle potential predators or threaten intruders. red light dissipates beyond about 30 feet (10 meters), so the reddish hue of this fish would appear black in deeper waters, allowing some degree of invisibility for this nocturnal hunter.