What currencies are available on Poloniex?

Excuse me, could you please provide me with some information on the range of currencies that are currently offered for trading on the Poloniex platform? I'm interested in diversifying my crypto portfolio and am considering exploring new opportunities within the platform. It would be helpful to know the full list of cryptocurrencies available, along with any unique features or advantages of trading on Poloniex with those specific coins. Thank you in advance for your assistance.