Dolphins and Porpoises

There are four main groups of marine mammals. They are cetaceans which include whales and dolphins, pinnipeds which includes seals and sea lions, sirenians which are manatees and dugongs, and fissipeds which are polar bears and two species of otters.

That's a well thought out question!

it send clicks that can travel more than a mile underwater.

Dolphins are usually in pods and are not too commonly seen alone. They have strength in numbers. Also, dolphins are a strong species and are rarely hunted by natural predators so humans are their main threat. Dolphins are a friendly species and don't generally bite so they are not able to strongly protect themselves against humans but they are very fast creatures, which also helps.

no.sharks are actually scared of dolphins.dolphins are smart quick witted animals.the second smartest animals in the WORLD (first is humans)when sharks approach,sharks hit them with their very sharp beak.and they swim away.hope this helped! :)

They can eat anything that fits into their mouth but they usually just eat beam

That depends, do you mean fin at the end of a cartoon or comic?

Here are A LOT of types of dophins:

the Bottlenose dolphin, the Killer Whale, the Common dolphin, the False Killer Whale, the Hector's dolphin, the Short-Finned Pilot Whale, the Commerson's dolphin, the Long-Finned Pilot Whale, the Black dolphin, the Atlantic Humpbacked dolphin, the Haeviside's dolphin, the Indo-Pacific Humpbacked dolphin, the Southern Right Whale dolphin, the Tucuxi, the Northern Right dolphin, the Pygmy Killer Whale, the Spotted dolphin, the Melon-Headed Whale, the Atlantic Spotted dolphin, the Irrawaddy dolphin, the Striped dolphin, the Rough-Toothed dolphin, the Spinner dolphin, the Risso's dolphin, the Clymene dolphin, the Fraser's dolphin, the White-Beaked dolphin, the Peale's dolphin, the Atlantic White-Sided dolphin, the Hourglass dolphin, the Pacific White-Sided dolphin and the Dusky dolphin.

Here are some river dolphins:

the Amazon River dolphin, the Chinese River dolphin, the Ganges River dolphin, the Franciscana and the Indus River dolphin. As you have probably noticed, the name of the species of these dolphins is related to the waterway that represents their habitat!

Hope this helped :D

They send out clicking sounds to check their location and communicate with each other. What happens is that the vibrations from the click bounces of objects in the sea such as other fish or the seabed etc and they pick up the vibrations and are able to translate it. This is known as echolocation :) hope this helps

If you are expecting an answer like "Axolotl" you would be wrong because Axolotls are salamanders they are not fish. The Lungfish uses its fins to walk but swims well, The same applies to all of the other so called walking fish.

a river bushwillow is eaten by large mammals in the African savanna like buffalo.

Your question is why do dollphins let people ride on them, well that is quit simple. Dolphins love people. They have been trained year to year the basic steps over and over, just like we go to school. If you want a hamburger go to 5 guys trust me. you also might want to know that Justin Bieber + Taylor Lautner are very hottttttt!!!! heHE hAHA

In general, yes. However, there are many species of dolphins that are critically endangered, among these include Maui's Dolphins (a subspecies of the Hectors Dolphin), The Ganges River Dolphin, and various other River Dolphins, to name a few.

There are 32-33 different species of dolphins and most of them have never been studied by marine biologists. Because of this, it is difficult to determine exactly how deep these mammals live. However, it is known that the bottlenose dolphin is a shallow dweller and do not go much more than 150ft deep.

I think white beaked dolphins live in tropical waters.

No, dolphins are smarter, but it depends on the species. For example, bottlenose dolphins scored the highest on the EQ test of all nonhuman animals, even higher than chimpanzees, which were use to be thought as the second smartest animal.

i really dont know what this answer is but i think the yes because the people are protecting the sea and the ocean lol i think the ocean aaaaaaaannnnnnnnddddddd the sea are the same thing lol :]

i have no idea but would someone please answer this?

playful and fun

they come in gray white and pink

BLUE too

Dolphins are known as the only mammal which lives in water.

This is very suprising that a dolphin looks like a fish rather than a mammal.

It is a mammal because it doesn't have scales nor hair.

Also it feeds young ones with milk. No fish does that. And as you know all fish lays eggs, but the dolphin doesn't. Rather than laying eggs, like all mammals it lays babies.

You can find information about a bat,the only mammal which can really fly in the Question ," Give a few resource Information about a bat ".

no point you can swim with dolphins in Florida at discovery cove or you can in the algarve at zoomarina or in Malta at mediterranio you cant swim with dolphins in tennerief at Loro parque though

Sharks

Sperm whales and the bottle-nosed dolphin are know to dive to depths near the record possible in pursuit of their food. The greatest difficulty experienced in such excursion is maintaining the proper ratio of blood gases. This is a problem for human divers as they take their air supply with them - but as whales and dolphins don't breath when they dive the whole of this complex science isn't applicable to them.

The truly horrific pressures at these depths are managed by matching the blood pressure to the external pressure. Cod-fish hauled up from great depths bloat something terrible which is what happens to deep-sea divers if they don't go through a prolonged decompression after the dive. Whales and dolphins however don't exactly increase their blood pressure. What they do is let their blubber (of which they have considerable) compress. This results in an constrictive pressure for the body. Whale and dolphin actually shrink a little in size when they go down. When they come up (quickly) the blubber decompresses and the internal pressure of the animal returns immediately to normal without the blood pressure ever having increased in and of itself

The temperature of (pure) water never goes below +3'C this is where water is the most dense. If you decrease the temperature of (pure) water any further it actually become less dense and proceeds to float. This is why ice floats on water. So the depths of the ocean is never below +3'C. This is cold but not terribly, it won't produce frost bite. Whales and dolphins are insulated by layers of blubber and really don't spend all that long in the depths. Think of sauna enthusiasts running from a sauna and jumping into freezing water. This is far more a temperature difference than what whales and dolphins experience in diving to the depths and the change happens far more slowly. If sauna enthusiasts find the experience 'pleasurable' why should whales and dolphins be discouraged by something far less traumatic.