Ah, you're asking about the Redtoothed Triggerfish, scientifically known as Odonus niger!

This is another fascinating triggerfish species, and here's a rundown of its key characteristics:

• Appearance: As the name suggests, a prominent feature is their bright red teeth, which are visible even when their mouth is closed. They have an elongated body, typically dark blue or purple, with lighter blue markings on the head and fins. Their tail has long, flowing lobes, adding to their graceful appearance.
• Habitat: They are found throughout the Indo-Pacific region, inhabiting coral reefs and areas with strong currents.
• Diet: Redtoothed Triggerfish are primarily planktivores, meaning they feed on zooplankton drifting in the water column. They may also consume sponges and occasionally small invertebrates.
• Temperament: While generally considered one of the more peaceful triggerfish species, they can still become aggressive, especially as they mature. It's important to choose tank mates carefully if keeping them in an aquarium.
• Aquarium Care: Due to their size (they can reach up to 12 inches) and potential aggression, they require a larger aquarium with plenty of swimming space. They are not reef-safe, as they may nip at corals and other invertebrates.

Interesting Facts:

• They have a unique swimming style, using their dorsal and anal fins for propulsion, making them highly maneuverable.
• They can change color depending on their mood, water quality, and diet.