VNS causes stimulation of the superior and recurrent laryngeal nerves and is associated with problems ranging from alteration of voice (66%), coughing (45%), pharyngitis (35%) and throat pain (28%) and hoarseness (very common) to frank laryngeal muscle spasm and upper airway obstruction (rare).
The giant manta is commonly found offshore, while the reef manta, as its name suggests, is found inshore near coral and rocky reefs. Manta rays live in the open ocean, swimming continuously through the water column instead of resting on the sea floor like other rays. Although much of their time is spent near the surface, they have been known to dive to depths of 100 feet.
Another of the harsh conditions in the abyssal zone is the enormous pressure. At depths of 4,000 meters to 6,000 meters, the water pressure is an intense 11,000 psi. Some animals that live in the abyssal zone include tripod fish, giant squid, and deep sea angler fish.t depths of 4,000 meters to 6,000 meters, the water pressure is an intense 11,000 psi. Some animals that live in the abyssal zone include tripod fish, giant squid, and deep sea angler fish.