White-Spotted Octopus

Callistoctopus macropus, often known as the Atlantic white-spotted octopus, is a captivating marine creature that inhabits shallow waters across various regions, including the Mediterranean Sea, warmer parts of the Atlantic Ocean, the 🌊 Caribbean Sea, and the Indo-Pacific area. Recognizable by its striking red color with white spots on its body and arms, this octopus can adjust its intensity of color when threatened, a behavior aimed at deterring predators.

Characterized by a mantle that can reach up to 20 cm (8 in) in length and a total body length up to 150 cm (59 in), the Callistoctopus macropus has notably long first pair of arms stretching about a meter, which are connected by a shallow web. It prefers habitats near the shore, living at depths up to 17 meters (56 ft) in environments like sand, rubble, or seagrass meadows. Often, this creature camouflages itself by burying in the sand.

Unlike its relative, the common octopus (Octopus vulgaris), this species is selective in its diet and is nocturnal. It ventures out at night to feed on small fish and invertebrates hiding in the branches of coral, such as Acropora and Stylophora. Its feeding process involves using its arms to scour coral clusters, often accompanied by groupers and other predatory fish that benefit from the octopus’s activity in uncovering sheltered prey.

Reproduction in Callistoctopus macropus is quite fascinating. Females lay eggs that are 4 by 1.2 mm (0.16 by 0.05 in) in size, attaching them with short stalks onto hard surfaces, where they form a sheet. During this time, the female safeguards the eggs, ensuring they receive proper aeration and remain clean, while she refrains from eating and eventually dies after the eggs hatch—an expected lifecycle pattern for octopuses. The hatchlings are planktonic larvae approximately 5.5 mm (0.2 in) in size, with short arms each bearing seven suckers, and they sustain themselves on tiny zooplankton, including crustacean larvae.