In Animorphs, there is no standard laser weapon. The Andalites use one weapon (the shredder) and the Yeerks use another (the dracon beam). It is known that the dracon beam, used by the Yeerks, "fires an intense red laser beam that brakes apart the body's cells at the sub-atomic level, causing an extremely painful death." This info was taken from Domenic's Anisite - The Ultimate Animorphs Fan Site. Although it is unknown how a laser could break apart cells at the sub-atomic level, it may be possible. The dracon beams fires a red beam and makes TSSEWW sound. Although not much is known about the Andalite shredder, it is known to be one long continuing beam, not a bolt. It is said that the Yeerks copied their technolgoy from Andalites and modified it, which means we can safely assume that since the Yeerks weapons are laser-based, so must the Andalite's weapons be. The shredder emits a green beam and makes a TSEEEWWW sound.