Great Barracuda

Geographic Origin and Biotope: Tropical and subtropical oceans worldwide. Juveniles inhabit mangrove roots (brackish or freshwater), while colossal adults patrol ocean reefs and the open sea.

Taxonomy and Morphology: Great Barracuda (Sphyraena barracuda). The alpha predator. Fusiform body designed for lightning acceleration. Protruding lower jaw, armed with uneven, razor-sharp conical fangs that slice prey in two.

Social Behavior: Solitary Hunter (as adult). Juveniles form dense protective schools, but once past 50 cm (20 inches) they become ruthlessly territorial and solitary. They often hover motionless in mid-water, staring at prey before darting at 25 mph.

Coloration and Sexual Dimorphism: Silver torpedo. Dark gray/green back (to blend with the bottom) and white/silver belly (to blend with the illuminated surface). Often shows dark streaks along the flanks.

Aquarium Setup: NOT a home aquarium fish. As an adult it reaches 2 meters (6.5 feet). Requires circular public pools (without sharp corners, otherwise it breaks its snout) of at least 10,000 liters (2,600 Gallons). Very powerful currents.

Diet and Feeding: Pure piscivore. Eats only live or thawed whole fish (sardines, mackerel). Attacks shiny baits (silver reflections). Must be fed with long tongs to avoid losing fingers.

Water Quality: Sensitive to hypoxia. Given its muscular bulk, it consumes enormous amounts of oxygen. Filtration must be monumental (Giant Skimmers) to cope with the organic load of digested whole fish.

Compatibility and Tankmates: Eats anyone. Can slice in two or swallow huge fish. In colossal tanks, it can only coexist with benthic sharks, giant groupers or rays, but the risks of mutual mutilation are always high.

Aquarium Reproduction: Completely impossible in captivity. They reproduce in the open ocean, releasing massive amounts of eggs that are dispersed by currents.

Risks and Diseases: The Murderous Attack (Broken glass and severed fingers). Extremely nervous fish. A sudden flash of light or an abrupt movement outside the tank makes it dart forward like a bullet, destroying thin acrylic or glass and killing itself. Its teeth cut bone.