I... I... I HAD 100 shares in my company, AUTOMATICALLY. Well, the stock was up at $51.00 a share, like the highest ever, but the stupid brokerage and paperwork took so dang long when I sold it that by the time the sale was finalized, the stock was only worth $43.00 a share!!!!
The grooves contain rows of tiny, flexible appendages called tube feet. Sea stars move by means of the tube feet, which are operated by a hydraulic, or water-vascular, system unique to echinoderms. Seawater, circulated through the radiating canals of this system, enters and extends the tube feet.ea star, also called starfish, echinoderm of the class Asteroidae, common in tide pools. Sea stars vary in size from under 1/2 in. (1.3 cm) to over 3 ft (90 cm) in diameter. They are commonly dull shades of yellow or orange, but there are many brightly colored ones as well.
These feet are controlled by a water vascular system. By changing the amount of water inside, the animal can extend or contract the feet to move about. Sea stars move around the same way (to view a movie of how sea stars move (~1.6M), click here). Mainly sea urchins use their feet to hang on to the bottom while feeding, but they can move fast, walking on their feet, their spines, or even their teeth. When a sea urchin dies, all its spines fall off, leaving only the test.