A marlin is a type of fish with a spear-like snout, elongated body and rigid dorsal fin. Marlins can weigh hundreds to thousands of pounds. Despite their large size, they are fast swimmers, reaching upwards of 50 miles per hour.Continue Reading
Some marlin species, such as the Atlantic blue marlin and the black marlin, can grow to be longer than 16 feet. They are popular targets for sport fishermen due to their size and because they are known to put up a good fight once hooked.
The blue marlin is famous in literature. Ernest Hemingway's "The Old Man and the Sea" tells the story of a fisherman and his battle to catch a blue marlin.Learn more about Fish
Discus disease and stressful conditions may cause fish to develop black spots on the body. It is necessary to test the pH levels, temperature and oxygen levels in the aquarium to determine the cause of the condition.Full Answer >
The torpedo-shaped body of a King betta is much larger than the body of the traditional betta fish. Males display brighter colors and have a more distinct beard than females. When ready to breed, females exhibit an egg spot and vertical stripes.Full Answer >
According to Aquariums Knowledge, red spots on a fish's body are usually a sign that its environment is in poor condition. Whenever a fish appears to be ailing, a water quality test is in order before any medication is added to the aquarium.Full Answer >
Some fish species are oviparous, meaning that the fish fry (babies) are born from eggs that are excreted from the female fish's body prior to hatching. Fish eggs are occasionally used by humans for food and fish bait.Full Answer >