
1) Science fiction short story 2) Work by Elizabeth Bear
Found on
https://www.crosswordclues.com/clue/tideline

A tideline refers to where two currents in the ocean converge. Driftwood, floating seaweed, foam, and other floating debris may accumulate, forming sinuous lines called tidelines (even though they generally have nothing to do with the tide.) There are four mechanisms that can cause tidelines to form: ...
Found on
http://en.wikipedia.org/wiki/Tideline
[short story] `Tideline` is a science fiction short story published in 2007 by Elizabeth Bear. It won the 2008 Hugo Award for Best Short Story and the 2008 Theodore Sturgeon Award (tied with `Finisterra` by David R. Moles). `Tideline` appears in the twenty-fifth volume of Gardner Dozois`s Year`s Best Science Fiction anthology. ==Plot summar...
Found on
http://en.wikipedia.org/wiki/Tideline_(short_story)

Area where two different water masses or currents meet, often concentrating nutrients, prey items, and flotsam.
Found on
http://www.encyclo.co.uk/local/22218

Area where two different water masses or currents meet, often concentrating nutrients, prey items, and flotsam.
Found on
https://www.encyclo.co.uk/local/22222
No exact match found.