This is a common Suriname Toad (Pipe pipe)

[8] Thereafter, the male will grab the front legs of the female, causing the clochea and the skin of the female to swell. This is called the amplexus.[9] The partners rise from the floor while in amplexus and flip through the water in arcs. The couple will swim around in the water until they have to swim to the surface to catch their breath. Afterwards, they will swim back down to the bottom of the water. There the male will lay on his back, with the female on top of him on her stomach.[10] During each arc, the female releases 3 to 10 eggs, which get embedded in the skin on her back by the male's movements, which can happen up to ten times.[