what are some of the behaviors of octopuses?
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Physiology\n\nOctopuses are characterized by their eight arms (not tentacles), usually bearing suction cups. These arms are a type of muscular hydrostat. Unlike most other cephalopods, the majority of octopuses — those in the suborder most commonly known, Incirrata — have almost entirely soft bodies with no internal skeleton. They have neither a protective outer shell like the nautilus, nor any vestige of an internal shell or bones, like cuttlefish or squids. A beak, similar in shape to a parrot's beak, is their only hard part. This enables them to squeeze through very narrow slits between underwater rocks, which is very helpful when they are fleeing from morays or other predatory fish. The octopuses in the less familiar Cirrata suborder have two fins and an internal shell, generally lessening their ability to squeeze into small spaces.\n\nOctopuses have a relatively short life span, and some species live for as little as six months. Larger species, such as the North Pacific Giant Octopus, may live for up to five years under suitable circumstances. However, reproduction is a cause of death: males can only live for a few months after mating, and females die shortly after their eggs hatch, for they neglect to eat during the (roughly) one month period spent taking care of their unhatched eggs.\n\nOctopuses have three hearts. Two pump blood through each of the two gills, while the third pumps blood through the body. Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen. Less efficient than the iron-rich hemoglobin of vertebrates, the hemocyanin is dissolved in the plasma instead of being bound in red blood cells and gives the blood a blue color. Octopuses draw water into their mantle cavity where it passes through its gills. As a mollusc, octopus gills are finely divided and vascularilzed outgrowths of either the outer or the inner body surface.\n\nDefense\n\nThree defensive mechanisms are typical of octopuses: ink sacs, camouflage, and autotomising limbs. Most octopuses can eject a thick blackish ink in a large cloud to aid in escaping from predators. They also have specialized skin cells both for color changing (chromatophores) and light reflection and refraction (iridophores and leucophores). They use this ability to blend into the environment to hide, communicate with other octopuses, or warn. The very poisonous Blue-ringed Octopus becomes bright yellow with blue rings when it is provoked. When under attack, some octopuses can autotomise their limbs, in a similar manner to skinks and other lizards. The crawling arm serves as a distraction to would-be predators; this ability is also used in mating. A few species, such as the Mimic Octopus have a fourth defense mechanism. They can combine their highly flexible bodies with their color changing ability to accurately mimic other, more dangerous animals such as lionfish and eels.\n\nReproduction\n\nWhen octopuses reproduce, they use a specialized arm called a hectocotylus to insert spermatophores (packets of sperm) into the female's mantle cavity. The hectocotylus is usually the third right arm. In some species, the female octopus can keep the sperm alive inside her for weeks until her eggs are mature. After they have been fertilized, the female lays roughly 200,000 eggs (this figure dramatically varies between species). The female hangs these eggs in strings from the ceiling of her lair. After the eggs hatch, the young larval octopuses must spend a period of time drifting in clouds of plankton, where they feed on copepods, larval crabs and larval seastars until they are ready to sink down to the bottom of the ocean, where the cycle repeats itself. In some deeper dwelling species, the young don't go through this period. This is a dangerous time for the larval octopuses; as they become part of the plankton cloud they are vulnerable to many plankton eaters.\n\nIntelligence\n\nOctopuses are highly intelligent, probably the most intelligent of
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Sponge larvae aren't sessile.\n\nThey catch their prey and eat them, and they don't photosynthesize.
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I'm partial to crabs. They are misunderstood. Each one has their own personality and temperament. Some even do tricks. It's a shame we execute them so quickly upon discovery.
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i like their ink sacs!  and if you dissect one, they have a special pen (remnants of the shell in molluscs) that you can write with!  so fun!  \n\nps. there are seen in all squids
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What fish is the brightest?\nThe SUNFISH\n\nRiddles for you:\nWhat can make an octopus laugh?\nTen tickles (tentacles)\n\nHow do you catch a school of fish?\nWith a bookworm
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Usually they either jump or swim. It is also possible for them to walk if they want to, and certain kinds can climb as well.
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I not sure, but, sometimes I play with these fuzzy little spiders as they seem to enjoy it. I poke at them with my finger and they run and then jump on my finger and look around as if they playing. As I look at them they seem to take on a personality that seems to have a face, including a nose. ;-)
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Physics. Look at the shape of their skull and beak.
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Mollusks (e.g., clams, snails, and slugs) and Crustaceans (e.g., crabs, lobsters, etc.)  Even the more active mollusks (squids, octopuses) and arthropods (flying insects)
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Yes, they can. The pacific giant octopus lives about two years and it can regenerate lost tentacles until it reaches an age of almost two years old when it loses the ability to regrow lost arms. Squid are also mollusks like octopi and cuttlefish, I believe they have that ability too.
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According to MY dictionary (the Oxford pocket Dictionary and Thesaurus,) it's Octopuses.\n\nBut according to\nhttp://dictionary.reference.com/browse/octopi\noctopi is fine!! My spell-checker thinks it's okay too...!!\n; )\n\nIf you offered me an 'octopie' - I'd think it was covered in pastry!!\n\nOh, and it's 'spelt' OR 'spelled'!! BOTH are correct...!\n; )
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I posted a link below that will give you some information on Sea Monkeys. I know they are a lot smaller than you expect at first anyway. Neat thing for kids to do.
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Here you go:\n\nhttp://www.bsd.sk.ca/~mkozlow/ocean/OctopusandSquid.html#anchor3361022\n\nActually they both have eight ARMS but squids also have 2 tentacles.
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Male octopus's have two special tentacle that are longer than the other six. He puts a sperm packet into the female with one of these tentacles.
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Octopuses are highly efficient predators.  A small octopus might take prey such as shrimp or small crabs, but one like the Pacific giant octopus will usually eat large crabs, grabbing them with its tentacles and biting through their shell with its hard beak, but can also take larger prey, up to and including sharks 6 or 7 feet long.\n\nOne of the reasons the octopus is so skilled at camoflage though, is the fact that many other critters consider it tasty as well.  They often hide during the day, and hunt at night.  Some species are such spectacular mimics that they can fool their predators by appearing to be rocks, coral, or even a group of sea snakes.
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They are arachnids, not crustaceans. Easy to find on the Indian Ocean shores. Dead animals eaters. Breath using gills, two sexed animals, egg layers, free swimmers. Outstanding feature: their blood is used as a reactive in a positive detection of human encephalitis.\n\nmore info: Barnes book of invertebrates
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The blue ringed octopus can sometimes be on the beach in rocks and crags with small pools of seawater when the tide goes out. People that are examining the beach for seashells and the like can not know the animal is dangerous, pick it up, and be bitten. The bite itself is painless so you don't know you were bitten until 3 minutes and you are dead. The venom can kill in three minutes and it is considered by many to be the most venomous sea creature.