Atlantic Pygmy Octopus

Octopus joubini

The Atlantic Pygmy Octopus has a red-orange coloration, which is influenced by chromatophores, allowing it to change shades from brown to orange. This small species reaches a mantle length of up to 4.5 cm (1.8 inches) and has arms extending to about 9 cm (3.5 inches). It can be distinguished from similar species, such as Octopus mercatoris, by its smaller egg size and distinct reddish-orange hue. This octopus often seeks refuge in empty clamshells or small openings on the ocean floor, using sand and gravel to cover its entrance for protection against predators. Found in the tropical waters of the Atlantic Ocean, particularly the Caribbean and Gulf of Mexico, the Atlantic Pygmy Octopus thrives at depths of 10 to 15 m (33 to 49 feet) on soft, muddy substrates. It prefers warm temperatures ranging from 18 to 25 °C (64 to 77 °F). Although specific predators are not documented, the octopus exhibits behaviors typical of its kind, such as using ink and camouflage to evade threats. This species is carnivorous, primarily feeding on small crustaceans by drilling into their shells with its radula and injecting venomous saliva to paralyze them. Breeding occurs between March and June, with females laying between 140 to over 2,500 eggs in sheltered areas. The hatchlings are fully formed and capable of hunting within hours of emerging. The IUCN lists the Atlantic Pygmy Octopus as Least Concern, although it faces potential threats from pollution and habitat degradation.