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The nurse shark is a large, sluggish, bottom-dwelling shark that is generally harmless unless provoked. It has very strong jaws, a stout body, and a wide head with obvious barbels (thin, fleshy, whisker-like organs on the lower jaw in front of the nostrils that sense touch and taste). The fourth and fifth gill slits are very close together. The dorsal fins (on the shark's back) are almost the same size and are rounded. Behind each eye there is a spiracle, an organ that takes in water used for breathing when the shark rests at the bottom. --- This specimen is a juvenile, length of 15cm and probably hatched a few days/weeks ago.