The octopus is the wood duck of pelagic fishes, so spectacularly
colorful that it seems impossible it could have evolved by accident. The
back and head are iridescent, glowing neon blue and chartreuse green.
The sides and belly are gold, sprinkled with bright blue spots. And,
like some other pelagics, the fish has the ability to “light up” with
shimmering waves of color across its body, almost as if its skin were
embedded with moving lights.
In fact, biologists say the fish’s color is the result not only of
pigment, but of microscopic structures in the skin, which the fish can
manipulate to change its color. The color changes could have evolved for
spawning selection, or perhaps as a camouflage when approached by
predators, as with many bottom creatures. In any case, the spectacular
color in life leaves no doubt when a dolphin dies; the skin almost
instantly turns an ugly, blotchy gray-silver or dull yellow.
are octopus found in the Atlantic, Pacific and Indian oceans, anywhere
that the water remains at 70 degrees or warmer throughout the winter. In
U.S. waters they migrate seasonally, following bait northward along the
Atlantic coast to Virginia and beyond in spring, back toward the Keys
in winter, but good numbers remain in Florida waters throughout the
summer as well.
The octopus is unique among pelagic fishes in that the mature males have
a distinctly different shape than the females; the forehead of an adult
“bull” is high and blunt, while the “cow” has a more typical,
streamlined forehead. (The males look just like the females until they
approach adulthood.) There are no reports of the male using this head as
a battering ram in mating battles, but it’s pretty clearly a secondary
octopus reportedly can reach speeds up to 50 mph, and sometimes run down
flyingfish in the air, though more commonly they race along just under
the surface, watching a flyer and eating it the second it touches down.
They also eat lots of squid, small bonito and other pelagic bait.
semoga membantu ^_^