How do biologists know that whale are mammals and not fish?

Whales and dolphins are rather large fish?

Actually dolphins are marine mammals, not fish. As for whales, the blue whale is the largest animal ever (as far as we, humans, know). So whales are indeed rather large fish.

What is the second biggest fish?

i don't know the biggest fish besides sharks and whales, but the sperm whale is the biggest whale.

When you see the spouts of a whale what are the whales doing?

The whales are breathing. They are mammals like people. They do not have gills like fish. I do not know why the mist comes up, but I am sure that when they do it they are breathing. I hope this helped

Where is whale found in the scriptures?

Nowhere.The word "whale" in the English translations of the book of Jonah in the Bible is a mistranslation of the Hebrew for a "large fish". A whale is a mammal, not a fish. We do not know the kind of fish the Hebrew was referring to.

Which fish has 3000 teeth?

whale shark or also know as the gentle giant

Are mammals more popular than non mammals?

No, I don't know exact numbers but mammals are outnumbered greatly by fish, reptiles & insects

Largest living fish?

The Shark's and Whale's are fish so I would probably say them otherwise I don't know!

Is a dolphins a fish or a mammal and how do you know?

Dolphines are mammals which are closely related to whales. They don't breathe like fish, that's why.

What is the respiratory organ of a whale?

Whales are mammals, so they have lungs.

Do fish give their young milk?

No. Mammals are the only animals to do this. Now if you mean whales and dolphins, those do, since they are also mammals.

Is there any mammal that lives beyond 100 years?

Individuals of several species of mammals have lived for over 100 years, but I don't know of any mammals whose average lifespans exceed 100 years. The human (due to medicine), the Blue Whale, the Fin Whale, the Bowhead Whale, the Humpback Whale, the Elephant, and the Orca all come close. Some people speculate that the Bowhead Whale's average lifespan is longer than 100 years, but this has not been proven.

What are the words to a Depressed Whale?

Fish: Hey Mr. Whale what's going on? Whale: Well to be honest I'm kinda depressed Fish: Aw, I'm sorry to hear that. Have you tried swimming around? Whale: Yeah I've tried swimming around. Fish: have you tried eating some plankton? Whale: yeah I've tried eating some plankton. Fish: well I guess that's about all a whale can do huh? Whale: Yep, and none of it helped. I'm still all depressed. And you know what else? Fish: what's that? Whale: this is a robbery! Give me your God damn money! Fish: whoa this took a turn Whale: I said gimme yo money bitch. Fish: I don't understand what's going on here. Whale: I'm not depressed! That was just a rouse. Hell, I don't even know if whales can get depressed. Fish: alright, alright I don't want any trouble Whale: you're Damn right you don't want any trouble! I'm a whale! Do you know how big whales are? People use whales as a synonym for God damn gigantic that's how big whales are. Fish: alright, alright. But uhh, there is something I should tell you. I'm an undercover cop! This is a sting! Whale: aww man this is crap! Fish: so how's this gonna go? The easy way? Or the hard way. Whale: I can't go to jail man. You know what they do to whales in jail? Nothing because whales are God damn humongous but it's still an Inconvience. Fish: well maybe we could work something out. Off the record. Whale: I would appreciate that. I've got tickets to Phantom of the Opera tomorrow. Fish: how about you give me whatever cash you've stolen and we can pretend this never happened. Whale: that sounds reasonable, except I'm an internal affairs officer investigating corruption! Fish: well then have I got a surprise for you! I'm not really a cop. I'm a fry cook at steak and shake. Whale: I'll be honest I don't fully understand where that leaves us. *End*