Dolphins and Porpoises

Whales eats crocodile as that's part of the food chain. Whales sometimes swim near estuaries and when see a crocodile, they approach and eat them. They eat crocodile in order to protect humans.

The spotted dolphin, as with any dolphin, is a mammal and therefore has a backbone, or vertebrate..

The mammal dolphin (there is a fish with that name) can be tamed. The biggest dolphin in the world is the Killer Whale/Orca and it can be tamed.

1-2 weeks

blue and gray

No, dolphins are mammals and mammals do not have scales. Reptiles are streamlined animals

Yes. They are fast swimmers, and their torpedo shaped bodies allow them to manuever swiftly through the water.

The Mysticeti and Odontoceti dolphins have been in existence for around twenty million years. The way this family is commonly known is as the Miocene family.

dolphins use their melons to produce sound waves.

No, they produce sound waves from their melon (a fatty egg-shaped organ inside their forehead) and the echo comes back and tells them about the prey so they know what to do. This technique is called echo location

They swim with their fins on the side and their tail rotates up down sideways and that's how they move around.

A koala's intestine is 2 metres in length. What is particularly long is the caecum, a part similar to e human appendi , whicis makes up about 29% of the total intestine length.

Swimming with dolphins at Discovery Cove is reserved for a half hour, (30 minutes) but if you pay the cost of double it would become and hour, (60 minutes).

Because fisher hunt tuna but also hunt the dolphin and kill them.
Not all types of dolphins are becoming extinct. Most dolphins that die of an unnatural cause, die in tuna fishing nets.

8 or 9 feet

200

yes dolphins do play games with each other. they plat something like "tag" with one another... they play all sources of games common to ours includes tag, hide and go seek, and other fun games. dolphins and just like humans in lots of ways. :)

Dolphins have a highly intelligent language of squeaks and squeals. They communicate with each other to warn each other of danger or to simply tell them where there are lots of fish! I hope this helps!

Yes, they can breath underwater because they are bugs and don't have antennas so their vertebrae cannot sense the fact that it may drowning or it cant even sense if it under water or not!

Dolphin is derived from the the Greek word for dolphin, dolphis, which was derived from the Greek word for womb, delphus. The animals name can then be translated as meaning "a 'fish' with a womb." Of course, we are talking about a marine mammal and not a fish.

All species of dolphins are mammals, and all mammals have bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side.

Dolphins jump for MANY reasons, spinner dolphins for instince are very energetic and spin when they jump, they jump for fun, other dolphins may use this as a signal to other dolphins that they need help with catching sardines etc. Some dolphins jump because it is easy for them to look ahead when they are higher than the sea, they may use it for navigational purposes, sometimes just jump to express hapiness and their excitement, or they may jump because they are full of energy and want to play. Dolphins sometimes use it to communicate things to other dolphins, other times for hunting and some may jump for the sake of jumping. =)
To breath or for people to see them.

Echolocation is the ability certain animals have to use sounds to navigate. They make sound and by hearing where it "bounces" from (hence the "echo") they are able to tell where something is located.

i don't know. you guess are so stupid you.

You'll need to major in Marine Biology, unsure about number of years you need.