What does a mackerel use to protect itself?

How do triops breathe underwater? What do cats eat, and do they include rabbits in their diet? What is the ideal pH level for maintaining a healthy aquarium water pH? What are the signs that a male cat in heat displays? Do animals pee from their ears? What is it called when you stay up all night? Is it safe for cats to drink sea water? What are two animals found in the frozen continent? What is the difference between fur and hair? What seabird does not lay eggs? What are the potential risks and consequences of inbreeding in cats? What kind sound does a heron make? How does cutting down trees affect the animals that live in and near the trees? What type of molecule is fructose? Can hay help keep animals cool as well as warm? Why is it important to keep the macaw alive? Do walking sticks carry their baby's on their backs? What are the benefits of colostrum for overall health and well-being? Can dogs safely eat hamburger meat? What are the benefits of having a cat hugging lamp in terms of providing comfort and warmth to your feline companion?