Rimary producers are present in every biome, including the deep sea. how can there be primary producers in the deep sea when sunlight does not penetrate to these depths? primary producers in the deep sea are chemoheterotrophs. primary producers in the deep sea use energy from chemical compounds to synthesize organic compounds using carbon obtained from co2. there are probably only two trophic levels in the deep sea because there is only light available from bioluminescent (glowing) organisms. the higher trophic levels (secondary or tertiary consumers) are probably only represented by one or two species because of the low levels of energy available from primary producers.