Definition of "tideline" []

• A line of floating debris, seaweed etc. that marks the boundary between two surface currents (noun)

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• "They love anything floating they will hide under boats a tideline of grass and trash i've even seen them hide under a sea turtle."
• "With the lights out he could catch the glimmer of the silver strip of surf along the tideline."
• "Meanwhile, Tagholm is crouched by the tideline, picking up bits of marine debris and inspecting them with forensic dedication."