Seaslug

A Seaslug is an item that can be found on the Fishing Platform during and after the Sea Slug quest. If a player attempts to pick it up, they will be hit for a small amount of damage. It can only be obtained by casting Telekinetic grab on it. If dropped, Telekinetic grab will need to be cast again in order to pick it up.

Trivia

 * This is a Discontinued item in RuneScape 2.