What must be incorporated into the captive diet of an established boxfish to fulfill its omnivorous requirement?
Answer
An herbivore preparation
Because boxfish are omnivores, a complete captive diet requires broadening beyond meaty items to also incorporate vegetable matter, typically provided as an herbivore preparation.

Related Questions
What general feeding classification applies to boxfish, based on their requirements?What unique behavior do boxfish use to expose hidden food sources in the sand?What two elements form the core of the boxfish diet when foraging in the wild?What food items are frequently used successfully to entice newly introduced juvenile boxfish to eat in an aquarium?What must be incorporated into the captive diet of an established boxfish to fulfill its omnivorous requirement?What toxic substance is released by boxfish when they become stressed in an aquarium setting?What physical feature of the boxfish dictates that sinking food is crucial for their feeding success in a community tank?What essential dietary components, reflecting their natural intake of whole invertebrates and sponges, must be prioritized for long-term health in captive boxfish?In which geographical areas are boxfish naturally found inhabiting coral reefs?Why is careful observation during feeding time non-negotiable for aquarists keeping boxfish?