How does a rainbow fish stay safe?

Are great white sharks in dangered? Can sharks live in the Black Sea? How is the structure of the gills suited to their function in respiration of a dogfish shark? What is a shark's skeleton made of? Do pufferfish hurt when you touch? Where to find a mermaid tail in poptropica? Is it O.K to put a red fantail and a Koi together? Do many plecos lay eggs in home grown homes as iv just looked at your tank and iv got about 10 baby plecos roughly 12mm big and iv read up that they are hard to breed and woundered if anyone else has? How can you identify piranha? Why is there a fish on the McCann crest? Should African land snails smell in their tank? Can white minnows be kept in a pond? Smoked whitefish while pregnant? Is an one eyed shark real? How long are alligators legs? Why do penguins live in salt water? What is the best 75 gallon aquarium filter? How often do water filters need to be changed? What are examples of Fusiform fish? Is a betta fish a bony fish?