Banksy confirms SEVENTH animal-themed artwork in a week after fans spotted images of fish on a police box in central London<br /><br />Banksy has confirmed he is behind a new swimming fish artwork which has appeared on a police sentry box in the City of London.<br /><br />It marks the seventh animal-themed piece the elusive street artist has claimed this week after he posted a photo of the artworks to his Instagram at 1pm. <br /><br />The artist appears to have used translucent spray paint on the glass windows to create the design, turning the sentry box into what looks like a giant fish tank.<br /><br />The artwork differs from Banksy's previous dark silhouette images of a goat, elephants, monkeys, a wolf, pelicans and a cat which have popped up in various locations across London since Monday.<br /><br />A small crowd assembled at the fish artwork since Banksy posted it on his Instagram at 1pm, while two City of London police officers arrived to examine the design.<br /><br />A man with a City of London high vis vest arrived and said he has been asked to take pictures of the structure.<br /><br />People are taking it in turns having photos taken in front of the police box.<br /><br />Two City of London police officers arrived today to examine the new design before taking pictures from the outside of the police box.