sharks

Sharks eat other sharks.

Humans eat sharks.

Killer whales have been known to kill sharks, but it's not known whether the whales eat the sharks. Recently a killer whale on the West Coast killed a great white shark and ate only the liver. No one knows why.

For more info, you can get answers on google.

There are many different types of sharks so it depends on what kind of shark you are talking about. Octopus and other sharks can eat sharks. Like suggested, try using google.

You can also try searching a2k, this exact same question was posted several months ago.

Here's the link:

http://able2know.org/topic/131478-1

Maybe it's the same teacher starting a new class for this year

Sounds like a good guess, Rosborne. I usually don't answer homework questions, but the topic interested me, and the referral to Google should put the student on the right path.

Maybe the same question will be posted annually for the next few decades. Then we can deduce when the teacher retires (or they switch to a new textbook).