Ezekial Lovecraft

Ezekiel Lovecraft sells and buys fish and bait in the town of Witchaven. He sells all normal Fishing equipment from his shop called Lovecraft's Tackle.

His skin is a sickly yellow colour, but he is apparently NOT possessed by the Sea slugs. His skin tone is suggested to have been caused by eating too much fish and having no fruit in his diet—in fact, not even knowing what a fruit is—as stated during Salt in the Wound in RuneScape 3.

Slug Menace
During the Slug Menace quest, he gives the player Page 2 of Brother Maledict's holy book, which he mysteriously received by someone who pushed it under his door, most likely agents of the Sea Slugs like Mayor Hobb, Brother Maledict, or Col. Jake O'Niall as these pages are used to craft special runes to be used as keys to free Mother Mallum from her imprisonment.

Trivia

 * Ezekial's last name is a reference to the famous American author of horror, fantasy and science fiction, Howard Phillips ("H.P.") Lovecraft. Ezekial mentions his family have always been either bait sellers or writers, and mentions his relative Howard. This is further confirmed by the nature of the quests he's involved in.
 * Instead of "Trade", like all other shop owners, he has a right-click option "Shop" that opens the shop's window.
 * Ezekial's favourite food is tuna, which is made clear in RuneScape 3's Salt in the Wound, for when fed any tuna-related item (such as a tuna potato with sweetcorn) he will exclaim "Tuna! My favourite!" and is healed a much higher amount of Hitpoints than normal.