Explanation:

 Pilot Whale
• Hundreds of short-finned pilot whales have been found stranded on the beaches of Tamilnadu.
• Increase in sound levels from ship traffic, sonic testing and oil drilling interferes with the navigation of the whales which often results in the sort of mass stranding.
• Also, following prey-rich currents might draw whales towards land, or they might end up panicking at the presence of a mega predator such as a killer whale. Gently-sloping shorelines can deceive whales dependent on echolocation for navigation.
• There’s also climate change or unnatural weather phenomena. In one recorded event, after a strong El Niño in 1982-83, a resident population of short-finned pilot whales apparently disappeared from areas along southern California.
• Is rehabilitation possible: Depending on how severely disoriented them are, rehabilitating some whales could mean transferring them to a special, correctional facility. The facilities have large pools with water temperatures maintained to simulate that near the shores. They also have medical experts monitoring the whales’ heart rates and their overall health at least once a day.
• How can beach whales be rescued: They are sometimes covered in wet towels and sheets, with volunteers pouring water over the mammals to keep them cool? Zinc oxide is placed around the blowhole to keep the airways clear and, sometimes, tents are placed over the pen to provide additional protection from the sun. After the monitoring, lasting days, the whales — before being released into the sea — are tagged with satellite markers to track their long-term progress.
• Pilot whales are of two types: Long-finned pilot whales living in cold waters and short-finned pilot whales living in tropical and subtropical waters.
• Pilot whales are among the largest of the oceanic dolphins, exceeded in size only by the killer whale or orca.
• They and other large members of the dolphin family are also known as blackfish.
• Short-finned pilot whales, inhabitants of deep, warm waters in the Indian, Pacific and Atlantic Oceans, and yet known for frequent stranding.
• Their pods of up to 50 animals form ranks that can stretch over a kilometre. This may explain how dozens of animals beach themselves across several kilometres, but it is not clear why they approach shallow waters in the first place.
• In India, the first recorded beaching of short-finned pilot whales was in 1852 near Kolkata