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.
Having not read enough about varieties of gold fish, i simply purchsed some pretty, colorful or different looking fish in pairs. i believe i have 2 boggle eye or telescopic eye (black), and a few other fantail species of different calico type colors. i also added some single tailed goldfish who have grown some absolutely gorgeous long flowing tails (different colors, some solid gold, some calico.. and had at one time two of what i call bobble heads due to the odd growth on their heads.