Blacklip Oysters were used in Goldsmithing (including the lure that catches Mahi-Mahi)
Red Coral is used in items that are quest items for 3 or 4 different crafting jobs.
White Coral goes very well
Never had good luck with Mahi-Mahi and thus it is not on the video. Only works on one bait, all the low level fish bite on that bait, and can only fish it in one spot during daylight hours.