Organs[ edit ] The stomach consists of three chambers. A few toothed whales, such as some killer whalesfeed on mammals, such as pinnipeds and other whales. Other common names for the beluga include "white whale" and "belukha. The narwhal and the beluga live only in the Arctic Ocean.
Odontocetes feed largely on fish and squid, but a few, like the killer whalefeed on mammals, such as pinnipeds. The killer whale hunts in pods and targets belugas and even larger whales. Thieme, Zutphen, the Netherlands A. The remaining chromosomes are metacentric—the centromere is approximately in the middle—and are rather small.
Some whales produce a variety of vocalizations, notably the songs of the humpback whale. The salt concentration in cetacean blood is lower than that in seawater, requiring kidneys to excrete salt. Toothed whales have well-developed senses — their eyesight and hearing are adapted for both air and water, and they have advanced sonar capabilities using their melon.
The melon is the "acoustical lens" needed for echolocation in toothed whales. The male genitals and mammary glands of females are sunken into the body. Most Odontoceti can distinguish between prey and nonprey such as humans or boats ; captive Odontoceti can be trained to distinguish between, for example, balls of different sizes or shapes.
A few species, such as the beluga whalelack them. All modern members of the infraorder are fully aquatic and live in the open ocean except a few species of dolphin which inhabit rivers and estuaries. By shifting the nostrils to the top of the head, the nasal passages extend perpendicularly through the skull.
The lens is almost spherical, which is most efficient at focusing the minimal light that reaches deep water. The last two to three pairs of ribs are not connected and hang freely in the body wall.
Baleen whales have bristles made of keratin instead of teeth. Baleen whales currently have no echolocation, but have most likely had that capability in the past.15 rows · They include the largest animal that has ever lived, the blue whale, which can reach Class: Mammalia.
Cetacea is an order from the Mammalia class. This group includes the marine mammals commonly known as whales, dolphins, and killarney10mile.com species are noted for their high intelligence. This group includes the marine mammals commonly known as whales, dolphins, and killarney10mile.com species are noted for their high killarney10mile.com: Mammalia.
The term Great Whales covers those currently regulated by the International Whaling Commission: the Odontoceti family Physeteridae (sperm whales); and the Mysticeti families Balaenidae (right and bowhead whales), Eschrichtiidae (grey whales), and some of the Balaenopteridae (Minke, Bryde's, Sei, Blue and Fin; not Eden's and Omura's whales).Class: Mammalia.
The scientific order Cetacea includes all whales. This large order is further divided into three suborders: the toothed whales, or Odontoceti (beluga whales, killer whales, dolphins, and porpoises), the baleen whales, or Mysticeti (fin whales, gray whales, and right whales), and the Archaeoceti Range: Arctic Ocean.
Dolphins Essay Examples. 24 total results. words. 2 pages. An Overview of the Scientific Order of Whales, Cetacea. 1, words. 4 pages. The Diffrences Between Dolphins and Porpoises.
4, words. 11 pages. An Overview of the Whales, Dolphins and Porpoises of Cetacea in Sea Animal Research. 1, words. 2 pages. The order Cetacea comprises two extant sub-orders and one extinct sub-order.
The extant sub-orders are Mysticeti (baleen whales) and Odontoceti (toothed whales). Both mysticetes and odontocetes are thought to be descendants of archaeocetes (Archaeoceti, ancient whales), an extinct killarney10mile.com are at least 83 living species of cetaceans, with 46 genera in 14 families.Download