Banksy unveils a new artwork in London depicting a shoal of fish on a police sentry box, his seventh animal-themed piece to surface in the British capital over the last week. The series created by the elusive street artist has sparked a frenzy of media interest and questions over its meaning. Banksy -- whose identity is publicly unknown and the subject of feverish speculation -- confirms on Instagram that the latest to appear overnight, in the City of London financial district, was his own. IMAGES