Definition

Noun A large, herbivorous marine iguana species (Amblyrhynchus cristatus) endemic to the Galápagos Islands. It is the only modern lizard adapted to a marine lifestyle, feeding primarily on underwater algae and seaweed.

Usage Notes

This term is a scientific binomial name (genus Amblyrhynchus, species cristatus). It is used in formal, academic, and zoological contexts to refer specifically to this unique reptile. In general conversation, it is commonly called the "marine iguana."

Examples

• The Amblyrhynchus cristatus is uniquely adapted to forage in the cold ocean currents surrounding the Galápagos.
• Scientists study the salt-excreting glands of Amblyrhynchus cristatus to understand its marine adaptations.
• A colony of Amblyrhynchus cristatus was basking on the black lava rocks.

Advanced Usage

• The term is often used in ecological and evolutionary studies to discuss island endemism and adaptive radiation, as famously observed by Charles Darwin.
• In taxonomic writing, the genus name () is capitalized and the species epithet () is in lowercase, and the entire binomial is typically italicized.

Variants and Related Words

• Marine iguana: The common English name for .
• Amblyrhynchus: The genus name, meaning "blunt snout."
• cristatus: The species epithet, Latin for "crested" or "tufted," referring to the row of spines along the animal's back.

Synonyms

• Marine iguana (common name)

Related Phrases/Idioms

• Galápagos icon: While not a fixed idiom, is frequently described as an "icon" or "symbol" of the unique fauna of the Galápagos Islands.
• Darwin's finches (contextual relation): Often mentioned alongside as classic examples of species observed by Charles Darwin that contributed to his theory of evolution by natural selection.

Noun

1. shore-dwelling seaweed-eating lizard of the Galapagos Islands