A Hydrothermal vent is an opening in the sea floor- where rich and hot water comes out. Hydrothermal vents typically form along the mid ocean ridges.
Primary producers are the original source of food in the vent ecosystem,using chemical energy to create molecules. Primary consumers get their energy from primary producers by eating or living with them.
Hydrothermal vents are the result of seawater percolating down through fissures in the ocean crust in the vicinity of subduction zone. the cold seawater is heated by magma and reemerges to form the vents