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Sharks
When many think of sharks, they think of the movie Jaws or a dangerous man-eating fish. In reality, sharks is a large group of fish that includes very small to much larger fish. Some can be harmful to man and others are harmless. To delve into this interesting and diverse group of cartilaginous saltwater fish that have sharp teeth and a bad reputation, ask your questions in this category.
5,520 Questions
Do all vertebrates have gill slits?
yes, all vertebrates have gill slits in the womb but as they develop most species lose the gills. this is an example of comparative embriology which helps scientist discover a common ancestor
Identify some homologous structures found on sharks?
The big one is their jaw suspension. its alot to look at but just google like hyostylic jaw suspension. basicly the jaw is suspended from the cranium by a hyomandibular arch. the "Bones" that make it up are homologous with less primitive fishes as well as our,human, inner ear.
Why the shark liver is so large and oily?
Oil is stored in shark's livers because livers store oil (or fat). When vertebrates digest food, the food does not go from their intestine to the blood stream but to the liver which decides what to do with it. That includes you.
The liver sends some food directly to the blood stream. It gives some additional processing, and rather that release all the food that came through the digestive track at one time it stores some. (Besides that it serves other functions.) If your body suddenly needs more fat than usual, your liver will release it. If the need continues for any length of time, your body will instruct your fat cells to start releasing fat. Sharks work the same way.
No. Plankton consist of any drifting organisms (animals, plant's, or bacteria) that inhabit the pelagic zones of oceans, sea, or bodies of fresh water and are unable to resist ocean currents. So, like any other fish, take it out of the water and it would suffocate, dry up and die.
Do grey nurse sharks eat or attack humans?
All sharks eat humans.Because they think you are food such as fish or squid.Splashing is the cause most of the time.If you are just swiming they may or may not attack you.They may attack because they think you are trying to hurt them.
Do sharks need their mothers when they are born?
Very little, since few (if any) species nurture their young.
What to do if you spot a shark?
Most sharks are just as scared of humans as we are of them however depending on how close there are and if they are acting aggressive people will react different. If you see a grey nurse getting aggressive lay on the bottom on the sea bed as they are unable to bite down. if you are getting attacked by a shark don't go for the eyes.. most sharks have covers over their eyes to protect them when they are chomping down, instead aim for the gills. With the larger sharks it's best to pose in a dominant stance, making yourself look larger. The main thing to do is stay calm, move calmly out of the water and if you're carrying a bag of fish from spear fishing it's best to let it go.
How do you know which shark is harmless and which shark is dangerous?
a shark looks like a gigantic fish, but with teeth. sharks are very well known predators around the atlantic ocean, pacific ocean, and some lakes, but people are taking care of that. sharks come in all different shapes and sizes, big, small, long, or short. the most well known shark is the Great White shark, about 1,000 deaths are reported every year for great white attacks. some people say that there is a prehastoric shark, called Megaladon, apparently, it is about 3 school busses long, and can kill a Blue Whale. if you want to look at sharks, goto DiscoveryChannel.com.
What is the body covering for a cartilage fish?
There is no real type of skin for cartilage fish. It varies..
Usally they grow to 10 feet long. Depth found in:120 feet below surface. (Known as the abyssal zone, the deepest and darkest part of the pacific ocean.
Lemon sharks are a greyish bronze color on top and a creamy white under neath.
Yes, a chiton is indeed a herbivore. This marine mollusk eats bacteria, diatoms, algae, and bryozoans. Most species are grazers but some are predators.
How many babies to manta rays give birth to?
they can have up to 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 babies
Dolphins are not dangoeous they are loving and carring mammels and ya i you torment or hurt them they might attack but you wouold do they same so really they are veary loving and playful animals and if i could i would ownone and swim with it every single minute of every single day so you better not ever ever toucj or pysically or menyally hurt any dolphin
What is the largest fish in sea and is it a filter feeder?
Blue Whales are the largest known living animal species on earth. Animals that were as large as 27 meters in length (nearly 90 feet) and weighing over 170 tonnes have been recorded. Since these animals were measured and weighed after they were cut up into manageable pieces, the actual size and weight could be even more
Not really. They eat totally different things, and there's no reason WHY they'd hate each other. I mean, Ronnie the dolphin might end up hating Paul the shark for personal reasons, but that has no impact on whether the species as a whole hates each other or not.
Are barracuda in the shark family?
The swordfish is the sole member of the family Xiphiidae, and are not related to other billfish (like the marlin), or sharks. Swordfish have skeletons, but sharks do not.
