Join a community of5,000+ocean lovers.

Sightings
5M+
Dive regions
232
App Store rating
5.0 ★

Scan to download the app

Download on the App StoreGet it on Google Play

Lesser Two-spot Octopus

Octopus bimaculoides

Lesser Two-spot Octopus
Photo by Lisa Biasillo · CC BY

About

The lesser two-spot octopus is a shape-shifting hunter of California's rocky reefs, named for the blue false eyespot under each real eye. It grows to a maximum weight of about 800 g and hides in plain sight through constant camouflage.

Also known as: bimac, california two-spot octopus, california mudflat octopus

Weight
max 800 g
Depth
up to 20 m

How to tell it apart

Its camouflage can make it nearly invisible against rock or rubble. The clearest sign it is this octopus and not a plain patch of reef is the ringed blue eyespot beneath each eye.

Appearance

Its skin is not heavily textured and usually appears grey with yellow splotches, though it can shift colour and pattern to match its surroundings. Under each eye sits a false eyespot, an iridescent blue ring set inside a circle of black, which gives the species its name. Its arms carry many suckers, which it also uses to taste.

Habitat

It lives on rocky reefs, sand, and muddy bottoms along the coast of California and Baja California, from the shallow intertidal zone down to about 20 m.

Diet

This octopus hunts at night, using its camouflage to sneak up on prey. Hatchlings start out eating small shrimp-like animals, and adults move on to fish and crustaceans, eating almost anything they can catch.

Did you know?

It has three hearts, blue blood, and a donut-shaped brain, and in 2015 it became the first octopus species to have its entire genome sequenced.

Log it in Into the Blue

Describe what you saw and we name it, then keep every species you find in your Oceandex.

Get the app

Similar species