Sharks and Minnows

British Bulldog (also running red rovers, red rovers, rovers, octopus, seaweed, bullies, bullrush, Russian bulldog, bulldogs charge, or simply bulldogs) is a tag-based game, of which red rover and cocky laura are descendants.

Most commonly one or two players – though this number may be higher in large spaces – are selected to play the parts of the "bulldogs". The bulldogs stand in the middle of the play area. All remaining players stand at one end of the area (home). The aim of the game is to run from one end of the field of play to the other, without being caught by the bulldogs. When a player is caught, they become a bulldog themselves. The winner is the last player or players 'free'.

The play area is flexible—it can be played on a street, a playground, between cloisters, in a large hall or on an area of a playing field—though there is no definition of the size of the pitch nor the number of players as long as there is enough space for the players to manoeuvre and enough players to have fun.

It is played mainly in the United Kingdom, the Republic of Ireland, South Africa, Australia, New Zealand (as bullrush or kingasini),Canada and other Commonwealth countries by children at school. Variants of the game have been recorded from the nineteenth century. It originated in the United Kingdom. The game is characterised by its physicality, often being regarded as violent, leading it to be banned from many schools, although this trend is now being reversed.

As is usual with games, the particular rules applied vary from location to location, but with the same principle. The playing area consists of a main playing area, with two 'home' areas on opposing sides (similar to the touchdown areas used in rugby or American football). The home areas are the width of the playing area and are usually marked by a line or some other marker.

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Wikipedia