The Thirteenth Year (1999) runs 1 h 35 min, is rated G in the US and averages 6.6 from 259 TMDB members. A teen learns that his birth mother is a mermaid after he begins to grow fins and slimy scales on his thirteenth birthday.
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Streaming availability by JustWatch. In the US, as of 2026-11-05: Disney Plus (subscription).
The Thirteenth Year on TMDB · This product uses the TMDB API but is not endorsed or certified by TMDB.

Lights Down is a free tool: tell it your streaming services and how long you have, and it ranks what you can stream tonight, with a this-or-that, a roll, a bracket and a wheel. Movie data from TMDB; streaming availability by JustWatch. Page updated 2026-11-05. This product uses the TMDB API but is not endorsed or certified by TMDB. Lights Down is a Somebody Decide program. How the data works · Legal & privacy · Tonight's lists