Do I need ETH to send USDT?

Excuse me, could you please clarify something for me? I'm a bit confused about the process of sending USDT. Do I actually need to have ETH in my wallet in order to send USDT? I've heard that some cryptocurrencies require a certain type of coin or token for transactions, but I'm not sure if that applies to USDT. Could you explain this to me, please? It would be greatly appreciated.