What is shape of a marine ecosystem ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Marine Ecosystem**: The marine ecosystem consists of various organisms that interact with each other and their environment in oceanic waters. It includes different trophic levels, from producers to top predators.

2. **Biomass Pyramid Concept**: The shape of the marine ecosystem can be represented by a biomass pyramid, which illustrates the distribution of biomass among different trophic levels.

3. **Inverted Pyramid**: In the marine ecosystem, the biomass pyramid is typically inverted. This means that the biomass at higher trophic levels (such as top carnivores) is greater than that at lower levels (like primary producers).

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