The answer is (d.) iridescent shark catfish.
Cartilaginous fishes are vertebrates that has jaws, paired fins, scales, and a heart like whale shark, great white shark, and manta ray. This class of fishes are divided into two: Elasmobranchii and Holocephali. While iridescent shark catfish is simply a shark catfish but not a shark.
The Answer is D Decomposers. Hope this helps!
ADminister morphine and make she she does not feel pain.
Answer:
The further you move down a classification pyramid, the fewer species there will be at each level >:3
Explanation:
:3