Rhinecanthus assasi

Datasheet

General Description

The Picasso Triggerfish, scientifically known as Rhinecanthus assasi, belongs to the Balistidae family, characterized by strong jaws used for crushing rock, shells, or corals during feeding. These fish vary greatly in behavior, making general descriptions challenging due to differences not only between species but even among individual specimens. They are typically found in the Western Indian Ocean, specifically from the Red Sea to the Gulf of Oman and the Persian Gulf.

Aquarium Suitability

Considered suitable with care, Picasso Triggerfish demand ample space and hiding spots in the aquarium due to their aggressive temperament. It is advised to avoid keeping them with peaceful or docile species, as they can display extreme aggression towards other fish, posing a threat especially to smaller fish and crustaceans. These triggerfish are not reef-safe and may nibble on sea urchins. Furthermore, they have been known to exhibit biting behavior towards humans and are attracted to biting rubber and plastics in the tank.

Care and Hardiness

Requiring a minimum tank size of 1500 liters, these fish have an average hardiness level. Owners are urged to provide a varied diet consisting of krill, Mysis, shrimps, crabs, mussels, small fish, octopus, snails, and algae-based foods. Picasso Triggerfish should be fed food that helps prevent overgrowth of teeth, such as clams, to avoid the need for stressful tooth-grinding procedures.

Reef Suitability

Not considered reef-safe, Picasso Triggerfish are known to be a challenge in coral aquariums. They tend to leave corals and crustaceans alone if well-fed, but their aggressive behavior and tendency to rearrange rocks and sand make them unsuitable for reef environments.

Aquarium Setup

When setting up a tank for Picasso Triggerfish, provide ample space, hiding spots like live rocks, and secure rock placement to prevent toppling. It is crucial to accommodate their aggressive behavior by offering plenty of space to minimize conflicts with other fish.

Behaviour

These triggerfish exhibit a vibrant personality, sometimes making grunting sounds when feeling threatened. They are known for their playful antics like rearranging rocks and sand, indicating a need for mental stimulation in their environment.

Feeding and Diet

A varied diet is essential for Picasso Triggerfish, consisting of different types of fish, larger crustaceans like shrimp and crabs, other invertebrates, and small crustaceans such as krill, mysis, and artemia. Owners should ensure a well-rounded diet to support their health and prevent potential behavioral issues.

Dimorphism

If information on dimorphism and captive reproduction is available, it would be beneficial to understand the physical differences between male and female Picasso Triggerfish and any insights into their breeding behavior in captivity.

Habitat and Distribution

In their natural habitat, Picasso Triggerfish are found in the East and West Indian Oceans, including the Red Sea. They prefer rocky areas where they can forage for food and seek shelter in between rocks. Understanding their natural habitat can help replicate suitable conditions in the aquarium setting for optimal well-being.