Here's why:
* Primary consumers: They feed on phytoplankton and other small algae, placing them at the level of primary consumers.
* Secondary consumers: They also consume zooplankton, small fish, and even other mysids, placing them at the level of secondary consumers.
Therefore, mysid shrimp are generalist feeders and play a crucial role in the food web as both a primary and secondary consumer. Their trophic level can fluctuate depending on their diet, which can vary based on their environment and the availability of food sources.