What happens between oceanic and oceanic plates in an convergent boundary?

At a convergent boundary between two oceanic plates, one plate is subducted beneath the other due to differences in density. This subduction creates a trench in the ocean floor and can lead to volcanic island arcs as magma rises to the surface. The intense pressure and friction at this boundary can also cause earthquakes. Over time, this process contributes to the recycling of oceanic crust into the mantle.