The different zones of a coral reef ecosystem are riverine, palustrine, and shore reef zone.

The statement you provided seems to be a bit incorrect. The zones of a coral reef ecosystem are typically classified as the fore reef, crest reef, and back reef.

1. Fore Reef: This is the zone that faces the open ocean. It is often the most diverse and complex zone, with a wide variety of coral species and other marine life.

2. Crest Reef: This is the highest point of the reef, often exposed at low tide. It is typically dominated by robust, wave-resistant coral species.

3. Back Reef: This zone is located between the crest and the shore. It is often more sheltered and can include seagrass beds, mangroves, and other habitats.

Riverine refers to areas around rivers, palustrine refers to wetlands, and shore reef could be considered similar to the back reef, but these are not typically used to describe zones within a coral reef ecosystem.