An Enormous Tentacle regularly attacks the trawler boat during the Fishing Trawler minigame, causing the boat's rail to be broken. When it appears, the chat box will show a message warning that The Kraken is attacking!. It can be chopped at using an axe, to chase it away. This rewards 5 Woodcutting experience per successful chop, as well as 10 trawler contribution points.
After the tentacle disappears, it will leave behind a broken rail in the place where it attacked, which can be repaired for 5 Construction experience, using a hammer. This also rewards 10 contribution points. It will also rip the net, which can be repaired by adding rope to the trawler net, which rewards 5 Crafting experience.