Acronym Soup: LAN ?

Questions

When eating, ----------?

When thirsty, a camel can swig down 25 gallons of water in less than ----------?

The spiny cheek, starsnout poacher, and monkeyface prickleback are all names of ----------?

When under extreme stress, such as when held in captivity, some octopuses will eat their own arms, which ----------?

The squirrel monkey's brain accounts for roughly 5 percent of its body weight - the largest percentage of any other animal. The human brain, by comparison, makes up about 2.3 percent of ----------?