The name format (name + numbers) is extremely common in gaming communities (like Twitch or Discord). "Hot" might refer to a specific "hot take" (opinion) or a "hot streak" (winning streak) by a user with this ID.
The unique conditions around deep-sea vents support an astonishing diversity of life. Organisms here have adapted to extreme conditions: high pressures, low temperatures (relative to the hot vent fluids), and a lack of light. Some have no mouth or digestive system, relying entirely on their symbiotic bacteria for nutrition. sone012 hot