Bubble Spurt	A soapy bubble that trails along after you for a while. If hit, you will suffer extreme slowness: To prevent the bubble from hitting you, its best to run around the crab itself. The bubble cannot make that hairpin turn and will eventually disappear.
Claw Swipe	The Crab will swipe at you with his extended claw, knocking you back: Simply run away once the Crab walks towards your position and stops in front of you.
Charge Blast	After scratching his head, he'll release a huge electrical charge that will stun you for several seconds: When you see his scratching motion, simply move out of the way to dodge it easily.
Head Ram	Once his talon is gone, he'll try to run up to you and bash you with his helmet: As before with his talon, as he runs up and stops in front of you, simply run away to avoid the radius damage.
Thundara	When the beast is completely defenseless of both talon and helmet, he'll start casting deadly Thundara spells: To prevent being stunned and hurt, simply move out of the way if you see the spell being cast underneath you and fire back at it with a spell of your own.

Later Cycles: Other than the increasing amounts of Mus that join the battle, the fight won't be much different in cycle 2. However, in cycle 3, he can obliterate you with his newly acquired Thundaga spell. It has an extremely wide radius and can stun you for more than just a few seconds. Get as far away from him as you can when you see him cast this.