Call of the sea is an aura available as part of the Members Loyalty Programme and can be purchased from Xuan at Varrock Marketplace. The aura increases the player's chance of catching fish by a certain amount, fastening the rate. As with all auras, if the account using it is logged out while the aura is activated, the timer will continue to run out. All versions of the aura stack with a summoning familiar's (granite crab, ibis or granite lobster) level bonuses
The tier one version was released with the Loyalty Programme with a discount: it was on sale for 400 points instead of 5,000.