In ice hockey, how many players from each team are typically allowed on the ice at once?

6

Who played Maria in the 1961 film version of "West Side Story"? Which animal is known for entering a reversible state of suspended metabolism called cryptobiosis? Who invented basketball in 1891? What Russian character, associated with the New Year, brings gifts accompanied by his granddaughter Snegurochka? Which American pop singer released her debut album "One of the Boys" in 2008?