{"id":30150,"date":"2025-10-21T02:29:00","date_gmt":"2025-10-21T00:29:00","guid":{"rendered":"https:\/\/save-us.life\/?p=30150"},"modified":"2025-10-21T12:16:18","modified_gmt":"2025-10-21T10:16:18","slug":"dolphins-are-formidable-predators","status":"publish","type":"post","link":"https:\/\/save-us.life\/zh\/archives\/30150","title":{"rendered":"Dolphins are formidable predators"},"content":{"rendered":"<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"626\" height=\"417\" src=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/unnamed-2024-09-01T102334.370-1.jpg\" alt=\"\" class=\"wp-image-30152\" style=\"width:1140px;height:auto\" srcset=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/unnamed-2024-09-01T102334.370-1.jpg 626w, https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/unnamed-2024-09-01T102334.370-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 626px) 100vw, 626px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>The dolphin is a marine aquatic mammal, sometimes of fresh water, an odontoc\u00e8te of the order of Cetaceans and in the families of Delphinidae, Iniids, Platanistidae and Pontoporiidae.\u00a0The dolphin is an excellent swimmer, gregarious and living in a group.<\/strong><\/p>\n\n\n\n<p>The dolphin, like any underwater mammal, is not a fish: the tail (caudal fin) is positioned in a horizontal plane (vs. vertical caudal fin in fish).\u00a0\u00a0As dolphins are mammals, it is better to speak of fins rather than fins.<\/p>\n\n\n\n<p>The size of dolphins varies from 1.8 to 9.5 meters.\u00a0Most species weigh between 50 and 200 kg. The orcas, which is a dolphin, hold records with a height of 9.5 meters for a weight of 9 tons.\u00a0The killer whale is the largest dolphin in the order Artiodactyla.<\/p>\n\n\n\n<p>If the dolphin is mostly a marine animal, there are freshwater dolphins, the botos in northern South America with the inies.<\/p>\n\n\n\n<p>Dolphins are found all over the world, mainly in the shallow seas of continental shelves, and are carnivores, eating mainly fish and squid.\u00a0The family of dolphins, the largest in the order of cetaceans, evolved relatively recently, about ten million years ago, in the Miocene.<\/p>\n\n\n\n<p>The life expectancy of dolphins is approximately 60 years, with a difference between males and females.\u00a0Females have a longer average lifespan than males: 70-80 years (females) versus 50-60 years (males).<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"520\" height=\"346\" src=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102628.291.png\" alt=\"\" class=\"wp-image-30153\" style=\"width:509px;height:auto\" srcset=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102628.291.png 520w, https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102628.291-18x12.png 18w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The penultimate dolphin species discovered was in 2011 with Tursiops australis.\u00a0Killer whales are also a dolphin.\u00a0The female is sometimes called a dauphine.\u00a0The last dolphin species described dates from 22 January 2014 with a Brazilian boto and the species Inia araguaiaensis: it took almost 100 years for a new freshwater dolphin to be recognized as a separate taxon.<br><br><strong>River dolphin species (family Platanistoidae) are generally small.<\/strong><br><br>These mammals are of the cetacean order.\u00a0They are average in size, or even relatively small compared to the animals closest to their organization.\u00a0Their heads are not monstrous like those of sperm whales and whales, but quite proportional to their bodies.<br><br>Their jaws are more or less advanced, in the form of a beak, and sometimes their edges are completely lined with numerous, conical and sharp teeth, sometimes these edges have only a very small number or even none at all.<br><br>Dolphins never have a baleen;\u00a0their vents have a common crescent-shaped opening on the head.\u00a0The body is elongated, smooth;\u00a0the anterior extremities have become fins (fins), the tail is flattened horizontally and bifurcated, the back is most often provided with a triangular fin, the udder, in number of two, are placed near the organs of generation;\u00a0the rod of males is trimmed with a bone in its interior, like that of carnivorous mammals, and it is protected in a sheath.<\/p>\n\n\n\n<p>Dolphins have neither the scaly body, nor the curved tail, nor the big head that painters give them in arabesques and other ornaments, but they have a fish shape.<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"626\" height=\"470\" src=\"https:\/\/ci3.googleusercontent.com\/meips\/ADKq_NaMa3Ri8x9QRB3-PWeJzgCWvNU9pdTD1soAqOhCngrloxlr0gCiAb8r91fqgwxxFap4i9N3gbGzLGXVxK9KX2wpnVrKyHYDIYYBxnH4hAJE0qlNleeoqKGk-HFb-zjsD1dVblreAN7nMpYDRj7Ez6HeNMjFcGaAJ5AK9yb9Kel212bwYlZuAdbV58GqEA=s0-d-e1-ft#https:\/\/img.freepik.com\/premium-photo\/group-dolphins-swimming-water-with-words-dolphins-swimming-water_1220218-7824.jpg\" alt=\"a group of dolphins swimming in the water with the words dolphins swimming in the water\"><br><br>Their smooth, bare skin is often blackish in colour, their figure is oval and their head ends most ordinarily in a point or beak.\u00a0The middle of their body is the widest and thickest part.<br><br>Their tongue is crenellated on its edges, they have no gall bladder, and the hole of Botal is not opened in them.\u00a0They have extremely small olfactory nerves, and have two small hearing ducts behind the eyes.<br><br>Their jaws are most often lined with a row of sharp teeth, the number of which varies greatly according to age and circumstances.\u00a0A certain variety has up to 56 at the upper jaw, and 60 at the lower jaw, but most have far fewer.<br><br>The teeth fit perfectly.\u00a0Their stomachs are, for the most part, divided into several cavities or pockets, like those of ruminant animals, they have no coecum, their other intestines are about four to five times as long as their whole body.<br><br><strong>It is observed that the dolphin species have a brain proportionally larger than that of other cetaceans, and are the most intelligent of all.<\/strong><\/p>\n\n\n\n<p>As the whales are heavy, wild and stupid, as the dolphins are agile, familiar and gifted intellectual faculties.\u00a0The first ones have fixed their stay between the polar ice-sheets where they live almost solitary and feed on mollusks, worms which they crush under their fanons;\u00a0the dolphins, on the contrary, spread themselves on the face of all seas, furrow them in wandering troops, and wreak havoc among the schools of fish.<br><br>The nature of whales is peaceful and decent, they have no natural weapons, and do not use their strength to oppress the tribes of animals that live among them.\u00a0Satisfied with their power, they cast protective and peaceful glances on all beings around them, and rule rather by the respect that they generate than by the despotism that they could use.<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"626\" height=\"351\" alt=\"Beautiful dolphin  swimming\" src=\"https:\/\/ci3.googleusercontent.com\/meips\/ADKq_NYVZwh8Cr151NcsfId5Vdu-tPIEHQb50eYKNnC18RuQmZFfbrDCGUiumtOMHmiAWJB-slwYvD2ekFPsd3qehxEzzEizWqw7BoirbEqQ4BPwPus9nQw1Wa9QjyABjhqFHVWqK4vA=s0-d-e1-ft#https:\/\/img.freepik.com\/free-photo\/beautiful-dolphin-swimming_23-2150873475.jpg\"><br><br><br><br>On the other hand, the dolphin family is armed with teeth, their character is violent, carnivorous, predatory and yet affectionate, capable of attachment and otherwise less brutal than other varieties of cetaceans.\u00a0Their instinct is more perfect, their natural more likely to sociability, more lively, more sensitive and more delicate.<br><br>These large organized masses, these heavy and colossal whales are apathetic, crude, coarse, insensitive beings;\u00a0while species of a less disproportionate size show more sensitivity, instinct and intelligence;\u00a0as if nature had wanted to compensate their weakness by these gifts, and to redeem the qualities of the body by the disadvantages of the spirit, in order to equalize, in a way, the animals among them, and keep them in a mutual independence from each other.<\/p>\n\n\n\n<p>Dolphins are, in a way, the whales\u2019 innate enemies, and often they attack them with vigour, and come together to hunt them.\u00a0Their ways are turbulent, active, the whales\u2019 ways are shy and slow.<br><br>The first make war on fish, chasing them quickly throughout the ocean, the second remain mostly near the poles, aspire to tranquility and rest, live alone or in pairs;\u00a0dolphins, on the contrary, flock in legions.\u00a0Thus the characters of these two families are in perpetual opposition.<br><br>The dolphin is a young dolphin, it is therefore the juvenile form of cetaceans, whose characteristic is, as for any mammal, to suckle its mother after twenty hours of life and for almost 4 years, depending on the species of dolphins.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102658.450.png\" alt=\"\" class=\"wp-image-30154\" style=\"width:551px;height:auto\" srcset=\"https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102658.450.png 600w, https:\/\/save-us.life\/wp-content\/uploads\/2024\/09\/image-2024-09-01T102658.450-18x12.png 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<p><br><br>There are currently almost 50 species of dolphins and porpoises that are grouped into six families: the ocean dolphin family is by far the largest.\u00a0The porpoise family is composed of seven members.\u00a0And there are four river dolphin families, each containing a single species.<br><br>However, classification is not an exact science and as new information and discoveries are revealed, deliberations will continue and some species of dolphins will likely be further divided into several species and\/or subspecies.<br><br>For example, the common dolphin is now recognized as having two variants \u2013 short-beaked and long-beaked.\u00a0In New Zealand, the Hector\u2019s dolphin has a subspecies known as the M\u0101ui dolphin.\u00a0There are only about 60 of this endangered dolphin.<\/p>\n\n\n\n<p><br>Names and nicknames can certainly be confusing; there are eight dolphin names that include the word \u201cwhale\u201d, including globicefales, false orcas and melon-headed whales. Two species have the whale and dolphin in their names: the northern right whale dolphin and the southern right whale dolphin. It is not surprising that the public and scientists are confused<br><br><strong>The difference between dolphins and porpoises<\/strong><br><br>Porpoises are smaller than dolphins because they are less than 2.5 m long. They are also typically larger than dolphins and have a small head, little or no beak and a small triangular dorsal fin (except for the Spotted Porpoises).<br><br>Porpoises and dolphins also have different tooth shapes. The porpoise\u2019s teeth are in the shape of a spade, while dolphins are conical.<br><br>There are six species of porpoises, including the Gulf Porpoise (Phocoena sinus), which is the most threatened species of all whales, porpoises and dolphins.<\/p>\n\n\n\n<p>More information<\/p>\n\n\n\n<p><a href=\"https:\/\/wiseoceans.com\/creature-feature-friday-maui-dolphin\">https:\/\/wiseoceans.com\/creature-feature-friday-maui-dolphin<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.doc.govt.nz\/nature\/native-animals\/marine-mammals\/dolphins\/maui-dolphin\">https:\/\/www.doc.govt.nz\/nature\/native-animals\/marine-mammals\/dolphins\/maui-dolphin<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>The dolphin is a marine aquatic mammal, sometimes of fresh water, an odontoc\u00e8te of the order of Cetaceans and in the families of Delphinidae, Iniids, Platanistidae and Pontoporiidae.\u00a0The dolphin is an excellent swimmer, gregarious and living in a group. The dolphin, like any underwater mammal, is not a fish: the tail (caudal fin) is positioned [&hellip;]<\/p>","protected":false},"author":11,"featured_media":30151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[2],"tags":[],"class_list":["post-30150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dolphins are formidable predators - Save Us<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/save-us.life\/zh\/archives\/30150\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dolphins are formidable predators - Save Us\" \/>\n<meta property=\"og:description\" content=\"The dolphin is a marine aquatic mammal, sometimes of fresh water, an odontoc\u00e8te of the order of Cetaceans and in the families of Delphinidae, Iniids, Platanistidae and Pontoporiidae.\u00a0The dolphin is an excellent swimmer, gregarious and living in a group. 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