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.
The deep-sea dragonfish has a special characteristic from most of its fellow deep-sea creatures. Most deep sea fish that can produce light produce blue light, but the dragon fish can produce not only blue light but a red light as well. This red light is emitted from a suborbital photophore.In order to see this red color, these dragonfish have two different visual pigments.ost deep sea fish that can produce light produce blue light, but the dragon fish can produce not only blue light but a red light as well. This red light is emitted from a suborbital photophore. In order to see this red color, these dragonfish have two different visual pigments.