Now available on a Criterion DVD, it can also be watched instantly on Netflix. Here's the Criterion blurb:
SYNOPSIS: British director Andrea Arnold won the Cannes Jury Prize for the intense and invigorating Fish Tank, about a fifteen-year-old girl, Mia (electrifying newcomer Katie Jarvis), who lives with her mother and sister in the housing projects of Essex. Mia’s adolescent conflicts and emerging sexuality reach a boiling point when her mother’s new boyfriend (a lethally attractive Michael Fassbender) enters the picture. In her young career, Arnold has already proven herself to be a master of social realism, evoking the work of Mike Leigh and Ken Loach; and she invests her sympathetic portraits of dead-end lives with a poetic, earthy sensibility all her own. Fish Tank heralds the official arrival of a major new filmmaker.
The Criterion WEBSITE for the film has the trailer and one of their great "Three Reasons" videos for it, along with several articles. Here's the trailer:
I like what Peter Rainer had to say in The Christian Science Monitor:
"Because Arnold hews the film so close to Mia's hurts, what might come across as a downer instead often has a startling immediacy. Only bad movies are depressing movies. "Fish Tank," for all its faults and vagaries, brings us up close to a fully realized human being, and that's revivifying.
Jarvis, who had no previous acting experience, was accidentally discovered by Arnold when she overhead the girl arguing with her boyfriend in a train station. Arnold was right to go with her instincts in casting an untrained unknown: Jarvis has an openness to the camera that a more accomplished performer might have lacked. Her acting has a moment-to-moment excitement because we can never tell what Mia will do."
I think it's worth your time.