Saltwater Fish
Canthigaster rostrata
Canthigaster rostrata - Caribbean Sharpnose Puffer

Canthigaster rostrata (Caribbean Sharpnose Puffer)

Species Description…

Scientific Name: Canthigaster rostrata
Common Name: Caribbean Sharpnose Puffer
Species Group: Pufferfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Semi-aggressive
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 4 (inches)
Min Aquarium Size: 50 (gallons)
Native Range: Western Atlantic, including the Caribbean Sea, Gulf of Mexico, and Florida

Overview

  • Native to the Western Atlantic, including the Caribbean Sea and Gulf of Mexico.
  • Recognized for its small, torpedo-shaped body, olive-brown coloration, and pale markings along its flanks.
  • A small but active species known for its playful and inquisitive nature.
  • Capable of inflating its body when threatened to deter predators.
  • Requires a well-structured aquarium with plenty of live rock for grazing and hiding spots.

Feeding

  • Omnivorous, feeding on algae, small crustaceans, and invertebrates in the wild.
  • Accepts frozen shrimp, mysis shrimp, marine pellets, and finely chopped seafood.
  • Requires hard-shelled foods such as snails or clams to naturally file down its continuously growing teeth.
  • Multiple small feedings per day ensure optimal health and prevent malnutrition.
  • A varied diet helps maintain its bright coloration and overall vitality.

Habitat

  • Commonly found in coral reefs, seagrass beds, and sandy lagoon environments.
  • Prefers stable water conditions with moderate water movement.
  • Aquarium setups should include rock formations, caves, and a sandy substrate for natural foraging.
  • Thrives in well-maintained marine tanks with a stable environment.
  • Providing hiding spaces and natural decor reduces stress and encourages natural behaviors.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) to support a strong immune system.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires effective filtration and regular water changes to maintain high water quality.
  • Should be kept in a peaceful tank environment to minimize stress.
  • Providing an enriched habitat and a proper diet supports longevity and overall well-being.

Compatibility

  • Generally peaceful but may nip at slow-moving fish with delicate fins.
  • Compatible with tangs, wrasses, and other semi-aggressive fish.
  • Not reef-safe, as it may prey on small invertebrates such as shrimp and crabs.
  • Should not be housed with overly aggressive fish that may stress or outcompete it for food.
  • Providing enough space and a structured environment minimizes territorial behavior.

Aquarium Behavior

  • A highly curious species that actively explores its surroundings.
  • Frequently seen picking at rock surfaces and searching for food.
  • Capable of inflating its body when startled, though this behavior should not be intentionally provoked.
  • Providing rock formations and natural decor promotes natural foraging behavior.
  • Over time, it can become highly interactive with caretakers and recognize feeding routines.