January 11, 2011. 1  According to Education Next, teachers retire, on average, at around the age of 58. AARP reports that 33 percent of all beginning teachers leave the teaching profession within three years of beginning their careers, but the majority of teachers continue teaching and can reap retirement benefits later in life.
Deep-sea anglerfish, hatchetfish, and lantern fish are among the best-known luminescent fishes. In most such fishes, luminescence is produced intracellularly; the light is emitted by special cells called photocytes. The anatomical structure of the luminous organs of many fishes is similar to that of squids.
Butterfly fish Facts. Butterfly fish is a type of marine fish. There are 120 species of the butterfly fish that can be found in tropical and subtropical regions of the Indian, Pacific and Atlantic Ocean. Many people keep them as pets, which is not very simple because they require specific conditions of water.utterfly fish is an omnivore (eats both meat and plants). It eats different types of algae and seaweed, worms, small crustaceans and zooplankton. Butterfly fish usually swims in the shallow water (up to 65 feet), because it eats animals and algae that can be found in this section of water.