Predatory fish may also be deterred by the alkaloid nature of the discharge which may interfere with their chemoreceptors.  Penis elongation has been observed in the deep-water species Onykia ingens; when erect, the penis may be as long as the mantle, head, and arms combined. In Mexico it is served with Tabasco sauce or habanero. From here, eggs travel along the gonocoel, where there are a pair of white nidamental glands, which lie anterior to the gills. In North America, fried squid is a staple in seafood restaurants. The battered version is known as 'lulas à sevilhana', named after Seville, the Andalusian city that popularised the dish. Squid are rapid swimmers, moving by jet propulsion, and largely locate their prey by sight. , In shallow-water species of the continental shelf and epipelagic or mesopelagic zones, it is frequently one or both of arm pair IV of males that are modified into hectocotyli. Some species are bioluminescent, using their light for counter-illumination camouflage, while many species can eject a cloud of ink to distract predators.  The blood contains the copper-rich protein hemocyanin, which is used for oxygen transport at low ocean temperatures and low oxygen concentrations, and makes the oxygenated blood a deep, blue color.  The following table lists squid species fishery catches that exceeded 10,000 tonnes (22,000,000 lb) in 2002. Some juvenile squid live higher in the water column than do adults. When frying, the squid flesh is kept tender by short cooking time. Unlike octopus, squid tentacles do not usually continue to move when reaching the table. Squid have featured in literature since classical times, especially in tales of giant squid and sea monsters. The vampire squid (Vampyroteuthis infernalis), however, is more closely related to the octopuses than to any squid.. Principle of counter-illumination camouflage of the firefly squid, Watasenia scintillans.  Such skin camouflage may serve various functions, such as communication with nearby squid, prey detection, navigation, and orientation during hunting or seeking shelter. Squid is roasted and served with hot pepper paste or mayonnaise as a dip.  As systemic blood returns via two vena cavae to the branchial hearts, excretion of urine, carbon dioxide, and waste solutes occurs through outpockets (called nephridial appendages) in the vena cavae walls that enable gas exchange and excretion via the mantle cavity seawater. , The sperm may be used immediately or may be stored. Squid are cephalopods in the superorder Decapodiformes with elongated bodies, large eyes, eight arms and two tentacles. The direction of travel is varied by the orientation of the funnel. , The squid mantle cavity is a seawater-filled sac containing three hearts and other organs supporting circulation, respiration, and excretion. National Oceanic and Atmospheric Administration - Google Books, Protein resources and technology: status and research needs - Max Milner, Nevin S. Scrimshaw, Daniel I-chyau Wang - Google Books, Using the seas to serve people: a report on the Massachusetts Institute of ... - Bronwyn Hurd, Massachusetts Institute of Technology. There are at least three names for squid in Konkani: 1. In Kerala and Tamil Nadu, squid are called koonthal, kanava or kadamba.In Coastal Karnataka Squid is also called bondaas, In Egypt, Cyprus and Turkey, squid rings and arms are coated in batter and fried in oil. A set of eight arms and two distinctive tentacles surround the mouth; each appendage takes the form of a muscular hydrostat and is flexible and prehensile, usually bearing disc-like suckers. Ultimately, all of these terms derive from the Late Latin calamarium, "pen case" or "ink pot", itself from the Latin calamarius, "pertaining to a writing-reed", after the resemblance in shape and the inky fluid that squid secrete; calamarius in turn derives from the Greek κάλαμος kalamos 'reed' or 'pen'. In Korea, it is sometimes served raw, and elsewhere it is used as sushi, sashimi and tempura items, grilled, stuffed, covered in batter, stewed in gravy and served in stir-fries, rice, and noodle dishes. In Chinese and Southeast Asian cuisine, squid is used in stir-fries, rice, and noodle dishes. They are used in cuisines around the world, often known as "calamari". This salty, strong flavoured item is served in small quantities as an accompaniment to white rice or alcoholic beverages. The heavily salted squid (usually sparkling enope (firefly) squid or Spear Squid), sometimes with innards, ferments for as long as a month, and is preserved in small jars. For example, groups of Humboldt squid hunt cooperatively, spiralling up through the water at night and coordinating their vertical and horizontal movements while foraging. These are injected into its bloodstream when the prey is bitten, along with vasodilators and chemicals to stimulate the heart, and quickly circulate to all parts of its body. , The skin is covered in controllable chromatophores of different colours, enabling the squid to match its coloration to its surroundings. , Squid form a major food resource and are used in cuisines around the world, notably in Japan where it is eaten as ika sÅmen, sliced into vermicelli-like strips; as sashimi; and as tempura.  In some species, the squid's saliva contains toxins which act to subdue the prey. The male has a testis from which sperm pass into a single gonoduct where they are rolled together into a long bundle, or spermatophore.  As with other molluscs, the allergen is probably tropomyosin. 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