How are the fish surviving if there is no oxygen entering into the fish tank. The fish tank is sealed?

answer; i believe its (ovulation);

plant because they survive by water, sunlight, ex.

explanation:

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.