what's the difference between a squid and a cuttlefish?
468060
crao_craz is correct.  \n\nOne of the main differences in the two groups is in the form of the pen/cuttlebone.\n\nCephalopod groups differ in the level to which they have retained or lost the shell ancestral to their mollusc lineage.\n\nThe extinct ammonites had a large, robust shell that protected their body and also provided ballast and buoyancy for deep diving.\n\nThe modern nautilus has a shell, but it is not as robust as the ammonite shells were.\n\nAnother extinct group, the belemnites, had an internal shell, used primarily for buoyancy issues.  It looked almost like a cigar encasing the rear portion of their anatomy.\n\nCuttlefish also have the remnant of an internal shell.  It's essentially a turtle-like shield of bone that sits on the back of the animal.  It is porous and can trap gases, useful as ballast.  They used to use this cuttlebone for a number of purposes, including maintaining/sharpening the beaks of pet birds.  You can still buy cuttlebones for this purpose, and they're still in the cuttlebone shape, but are no longer made from actual cuttlefish bone.\n\nIn squids, the shell is reduced to nothing but a pen.  This is a sheet of stiffening cartilage-like material in the mantle that provides support and structure to the squid's body.  In most species it's transparent, and about the thickness and consistency of the plastic they use to make blister packs of batteries.\n\nIn octopus, the pen is gone completely, allowing them to squeeze through cracks and crevices as long as they can fit their eyeballs and beaks through.
159675
Octopus it actually has 3 hearts. Each gill has its own heart. Blood picks up oxygen in the gills, but after going through capillaries, it loses pressure. The third heart then pumps the oxygenated blood to the tissues all over the body.
321232
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
7930
Toads and frogs are BOTH amphibians.  Frogs have more permeable skin so lose more water through their skin and need a wetter environment.  Toads have dryer, wartier skin and are generally darker in color. Frogs lay eggs in clusters on water, toads lay eggs in strings. Frogs jump farther and have longer legs, toads hop. Frogs have tiny teeth, toads do not have teeth.
344484
No, not same family\n Squid, - Kingdom: Animalia\nPhylum: Mollusca\nClass: Cephalopoda\nOrder: Teuthida\nFamily: Ommastrephidae (and others)\nOctopus, - Kingdom: Animalia\nPhylum: Mollusca\nClass: Cephalopoda\nOrder: Octopoda\nFamily Octopodidae\nBUT same Class (Mollusc) and Phylum (cephalopod)\n\nThe Cephalopods ("head-foot") are the mollusk class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusk foot, a muscular hydrostat, into the form of arms or tentacles. Teuthology, a branch of malacology, is the study of cephalopods.
37114
Most sea monsters like Loc Ness are only myths that started long ago to explain odd happenings. But there are lagre creature that do ocupy the ocean and other deep bodies of waters. There are Giant Squids (Architeuthis dux)and other creatures that have adapted to live deep in the oceans. Usually the can live in high pressure and low light conditions and are generally not too cute looking in you are interested you could try this web site http://www.extremescience.com/deepcreat.htm
248761
PEARL is the right answer.\n\nPearls are developed in oysters, muscles, etc that live in the water.\n\nIf u cut P u have EARL which is a title given to the British nobleman and usually put on the doors. \n\nIf u cut L u have PEAR which is a fruit. \n\nIf u cut P and L u have EAR which is with you.
674386
They are really altering thier color.  Cuttlefish, for example, have specialized pigment cells (chromatophores) that contain different colors. These cells compress or expand to increase or decrease the balance of the color in that area.  The overall effect is much like the pixels of your computer screen, different color concentrations and mixtures changing what you see.
983483
There is no "one" type of fish that squid eat.Squid will eat any fish that is capable of capturing in its tentacles.Squid do tend to feed on smaller fish such as jack,sgt.major etc.Squid not only eat fish but also other squid which makes them cannibles.In Mexico there is a squid nicknamed "the red devil" that has even eaten humans that have fallen overboard,Discovery Channel recently showed a documentary about this squid.
701844
Snails are mollusks; that puts them in the same phylum as clams, oysters and cuttlefish.
786889
There is no evidence that Giant Squids have ever eaten people.\n\nThe largest one on record, that anyone has seen, is about 44 feet> However, a beak found within the stomach of a sperm whale was so large that it is believed the squid it came from would have had to be nearly 200 yards long.  It has not been determined if this came from a giant squid or another species that may be smaller, but have a larger beak.
258574
a jellyfish is an invertebrete.\na cuttlefish is not a fish!! it is a cnidarian, henceforth an invertebrate\n\nan eel is a vertebrate
110483
Very true. Mollusc anatomy and physiology could fill a book.  Anatomy of a snail? A squid? A chambered Nautilus? A seahare? They are all molluscs yet very widely in their anatomy and physiology.\n\nThe books the above poster referenced are excellent college level texts that cover most invertebrate life.  I would also suggest for a more simple approach the Marine Biology Coloring Book. It is not a kids book, but has some good diagrams on a variety of molluscs.\n\nThere are a number of websites that have valid information as well. If you edit your questions, I can post some links to specific species informative web sites.
967122
Well,\nReptiles have scales. Amphibians have smooth skin (although some are warty). \nReptiles are total land animals. Amphibians need the water. And yet this is not always true. There are many marine reptiles, but they must go ashore to lay their eggs, well the sea snake might be a possible exception there. There are also amphibians that are able to spend their whole lives out of the water. They are rare, but there. \nThe real big difference (other than scales) is that reptiles use hardshelled, amniotic eggs for their babies. All amphibians have soft jellylike eggs. \n\nThere are several anatomical (pertaining to body structure) and reproductive differences between reptiles and amphibians. Reptiles include alligators, crocodiles, turtles, and snakes. Amphibians include salamanders, toads, and frogs.\n\nOne difference between the two is the structure of their outer skin. Reptiles are covered with scales, shields, or plates, and their toes have claws. Amphibians, on the other hand, have moist, glandular skins, and their toes lack claws.\n\nThe eggs of reptiles have a thick, hard shell that protects the developing embryo from moisture loss, even on dry land. In contrast, the eggs of amphibians lack a hard outer covering and, thus, must be laid in water or in damp places.\n\nFinally, young reptiles are miniature replicas of their parents in general appearance, although not always in coloration and pattern....\n\nReptiles and amphibians, along with birds, fish, and mammals, belong to a group of animals known as vertebrates. Vertebrates have a bony backbone–a strong, flexible column to which other body structures are attached. Reptiles and amphibians vary enormously in size, from tiny frogs and lizards only half an inch (1cm) long to some crocodiles and snakes that can reach lengths of nearly 30 feet
1006024
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; )
421909
Answerer 1 and answerer 4 are both correct in the majority of squid species. However, in the giant squid, and some bodies have been found and dissected, the male contribution can be stored in the female body for a long period of time until she is in need of being fertilized. This is why giant squid are thought to be solitary animals unlike the majority of squid which have no ability nor any need to store anything because those are in large groups of squids constantly.
780971
Octapi and Squid are underwater animals, the flying Spaghetti Monster is an air breather. Their noodly appendages may be simlar looking, but serve completely different functions. They are not realated.