Seeker

Seekers are a type of Sub Weapon in Splatoon.

Description
Upon deployment, Seekers chase after the closest enemy to them, leaving a trail of ink in their wake. Upon reaching the targeted enemy, they explode in a burst of ink. The Seeker's AI is not particularly intelligent, and should be aimed directly at the opponent if possible. The Seeker will also explode if it hits a wall. According to Judd, diving in one's own Ink will cause a Seeker to switch targets.

Tips

 * Use it to ink long paths. Not only does it keep you at a safe distance, you can also focus on other things while the Seeker does its job.
 * This can be used to quickly ink your team a path to a Splat Zone at the beginning of Ranked Battles, giving your team an edge in capturing the zone.
 * In Octo Valley, use the seeker to take out far-away enemies and to ink long paths. It is especially useful in levels which require sneaking - it distracts Octolings and will ink a path for you to hide in.
 * Holding lets you select a target for your Seeker to chase. You can only target foes who aren't hiding in their ink, though, regardless of whether their position is tracked by your team or not.
 * This can be used to survey your surroundings, especially in Ranked Battle.
 * When traveling on the ground, seekers leave an ink rippling effect nearly identical to that of an Inkling swimming through ink. Therefore, if a player swims through the trail of ink directly behind a seeker, they will become functionally invisible.
 * This can be used in many different ways. A player can follow directly behind the seeker all the way to the explosion of ink, or stop swimming at some point along the trail, allowing for some crafty surprise splats.

Sets
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Trivia

 * Seekers are the least common Sub Weapon, included in just four weapon sets.