Garibaldi

Fascinating facts about the Garibaldi

• At up to 35.6 cm (14 inches) long, the Gar Garibaldi is the biggest damselfish, and males are about an inch larger than females – a rare size reversal among southern-California reef fish.
• During the breeding season (March – July) a male clears a nest, then guards the eggs for 19–21 days, timing hatching to the two-hour window after sunset to dodge hungry planktonic predators.
• Juvenile Garibaldis spend about five years in their bright, blue-striped coat before turning the deep orange of adults, reaching full adult coloration around age 5 and sexual maturity at age 6.
• Territories of both sexes cover just 3–10 m² year-round, but males will chase off much larger intruders – even biting divers – to protect their nest and the developing embryos.
• While most damselfish live only a decade, a 2022 study recorded a Garibaldi that was 57 years old, making it the longest-lived member of its family by a full 20 years.

At a glance

About the Garibaldi

The Garibaldi (Hypsypops rubicundus) dazzles the Pacific coast with its uniform, vivid orange hue, a coloration that deepens from the iridescent blue-striped juveniles to the solid orange of adults. Growing up to 35.6 cm (14 in) and displaying a rare sexual size dimorphism, males about an inch longer than females, this deep-bodied damselfish is a striking presence on the rocky reefs and tide-pools from Monterey Bay, California, to Guadalupe Island, Baja California. It favors clear, exposed or semi-protected waters up to 30 m deep, nesting in crevices and small caves where the male clears a sheltered patch of red algae for the eggs. During the March-July breeding season, the male fiercely guards the nest, even biting divers, while the female selects nests already containing young eggs, a strategy that reduces predation risk for her own clutch. Beyond its bright exterior, the Garibaldi’s diet is a versatile omnivory: it scrapes fleshy red algae, polychaete worms, anemones, sponges, and even its own eggs from the rock substrate, showcasing a flexible foraging skill set that sustains it across its subtropical range. A surprising facet of its life history lies in its longevity: while most damselfish live only a few years, Garibaldi can reach 12 years on average, with a record individual aged 57 years reported in a 2022 study, making it the longest-lived damselfish by two decades. Juveniles, cloaked in blue-streaked orange, inhabit tiny crevices for protection, gradually shedding the blue as they mature around five years and attaining sexual maturity at six. Their territoriality persists year-round, with both sexes defending 3-10 m² patches, a behavior that underscores their strong site fidelity and the complex social dynamics of this iconic California state fish.

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