User blog comment:Lord Loss/Monster Appreciation Day: Lagiacrus/@comment-71.35.236.48-20120208011640/@comment-5119824-20120629164642

If you are completely clueless, it may be a good idea to go online with a couple of other hunters and fight Lagiacrus then. It will help to teach you what to expect, how to manuever, and if the hunters you go with are experienced, then you can learn some techniques from them.

Also, it would be a good idea to do some reading up on the Lagiacrus wikia page. If you throw a sonic bomb in the water near Laigiacrus's head, he will flinch and occasionally drop a shiny, unless he is in rage mode. He is also quite susceptible to flashes, as he has a wide field of vision. The part of his belly, below his chest, that is a deep brownish color is the best place to aim for if you want Laigiacrus's health to drop down faster. Good luck!