In the given food web from a coral reef ecosystem off the coast of the Marshall Islands in the Pacific Ocean, none of the mentioned organisms (rattle snake, desert iguana, coyote, raven, kit fox) are secondary consumers.
In a coral reef ecosystem, secondary consumers would include species like carnivorous fish (e.g., groupers, snappers), certain species of crabs, and some predatory sea stars. These organisms feed on primary consumers such as herbivorous fish, small crustaceans etc.
Secondary consumers are typically organisms that feed on primary consumers which in a coral reef ecosystem would be organisms like herbivorous fish or small invertebrates.
The organisms listed here are more commonly associated with desert or terrestrial ecosystems and would not be part of the food web in a coral reef environment.
Therefore, there are no secondary consumers among these organisms in the provided food web.