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.
What are some of the different animals that make light? Although bioluminescence may be considered rare as measured by the total number of species, it is extremely diverse in its occurrence. There are many different types of organisms that produce bioluminescence, from microscopic cells to fish and even a few sharks. But there are no luminescent animals in higher vertebrates above the fish. Overall, luminescent organisms represent most of the major phyla.