it has a medium tail
Short-tail stingray was created in 1875.
I belive it is is a vertebrate
The largest stingray, the short-tail stingray, can grow upwards of 2.1 m (6.9 ft) across. The pelagic stingray, which is one of the more common stingrays, can reach widths of 56 cm (23 in) in length when fully grown.
short tail
A stingray's tail can vary significantly in length depending on the species. Generally, their tails can be anywhere from a few inches to over 5 feet long. In some cases, the tail can be even longer than the body of the stingray itself. The tail often contains a venomous spine used for defense.
6 feet across 14 feet long including its tail
I was just looking for this too. I believe you may be thinking of a horseshoe crab, it has a long tail like the stingray and has a shell.
The tail is called a barb. It has poison that can be deadly.
A pigs tail is short and curly.
yes because it has a tail
The first defense of a Blue Spotted Stingray is it's color. It's bright color is a warning to predators that it's poisonous. This breed of stingray, as most, also has a long tail with barbs on it. The tail contains a venom. The Sting ray will stab with it's tail, using the barbs to cut whatever is threatening it and releasing the venom into the predator.
The stingray has a nearly round pectoral fin disc usually colored brown or grayish brown above, with pale yellow spots or reticulations. Some individuals are plain or black. The underside is white to yellowish. The tail is short and stout, with a long, thick, serrated stinging spine.