lower1. 1  to cause to descend; let or put down: to lower a flag. 2  to make lower in height or level: to lower the water in a canal. 3  to reduce in amount, price, degree, force, etc. 4  to make less loud: Please lower your voice.
Biggest Whale-Basilosaurus (60 Tons). Basilosaurus (Nobu Tamura). Unlike the other mammals on this list, Basilosaurus can't lay claim to being the largest-ever of its breed--that honor belongs to the still-extant Blue Whale, which can grow to as much as 200 tons.
The Blue Whale is the largest animal to have ever lived on Earth. It is quite larger than the Liopleurodon, even though the Liopleurodon is still quite large. Blue whales aver â¦ age around 80-90 feet, (24-27 meters) and the largest specimens can reach 100 feet (30.5 meters) or slightly more. Blue whales additionally weigh around 100-150 tons, and the largest up to 200 tons.