Level 1 - Absolute Beginner

Scientists found a new kind of octopus. It lives very deep in the ocean near the Galapagos Islands. The octopus is small and blue.

The octopus is about the size of a golf ball. Scientists gave it the name Microeledone galapagensis. They first found it in 2015 but studied it for many years.

Scientists used a special X-ray machine to look inside the octopus. This helped them learn about the new species. They published their findings in May 2026.

octopus

a sea animal with eight arms and a soft body

scientist

a person who studies the natural world using careful experiments and observation

deep

far down from the surface

species

a group of living things that are the same kind and can reproduce together

island

a piece of land completely surrounded by water

X-ray

a kind of scan that shows the inside of a body or object

sample

a small amount or example taken to study something larger

publish

to share research or a book with the public so anyone can read it

Level 2 - Elementary

A brand-new octopus species has been described from a single female specimen collected nearly 6,000 feet below the Galapagos Islands in 2015. The creature, named Microeledone galapagensis, is only about the size of a golf ball and displays a striking blue color unusual for deep-sea creatures.

Scientists at the Field Museum in Chicago used micro-computed tomography scanning to create detailed three-dimensional models of the octopus without cutting into it. This non-destructive technique allowed researchers to study the animal's internal organs in fine detail. The findings were published in the journal Zootaxa on May 25, 2026.

According to octopus expert Janet Voight, Microeledone galapagensis is the first deep-sea octopus on record from the equatorial Pacific in the eastern ocean. Researchers say the discovery is also important for ocean conservation, as little is known about the fragile ecosystems that exist at great depths.

specimen

a single example of an animal, plant, or object used for scientific study

micro-CT scan

a high-resolution X-ray technique used to create detailed 3D images of small objects

non-destructive

a method that does not damage the object being studied

internal

on the inside of a body or structure

fragile

easily broken or damaged; delicate

equatorial

near or relating to the equator, the imaginary line around the middle of the Earth

conservation

the protection of animals, plants, and their natural habitats

journal

a scientific publication where researchers share their findings with other scientists

Level 3 - Intermediate

A tiny golf-ball-sized blue octopus collected nearly 1,800 meters below the surface near Darwin Island in the Galapagos Archipelago has been formally described as a new species: Microeledone galapagensis. The announcement appeared in the journal Zootaxa on May 25, 2026, nearly a decade after a remotely operated vehicle aboard the exploration vessel E/V Nautilus retrieved the single female holotype specimen during a 2015 deep-sea expedition.

Researchers at Chicago's Field Museum employed micro-computed tomography at the museum's CT laboratory to build detailed three-dimensional models of the octopus without physically cutting it apart. This approach generated internal-organ views sufficient to support a formal species description, including the arrangement of the suckers, the structure of the beak, and details of the reproductive tract that place the animal within the genus Microeledone.

According to Field Museum invertebrate zoologist Janet Voight, the discovery establishes the first deep-sea octopus record from the equatorial Pacific's eastern waters, filling a major geographic gap in the known distribution of the genus. The striking blue coloration may result from the presence of copper-based hemocyanin pigments in the animal's blood, a feature shared by many cephalopods. The find adds to growing evidence that the eastern Pacific deep sea harbors significant undescribed biodiversity.

holotype

the single specimen on which the formal description of a new species is based

remotely operated vehicle (ROV)

an unmanned, remotely controlled underwater vehicle used for deep-sea exploration

cephalopod

the class of mollusks that includes octopuses, squids, and nautiluses

hemocyanin

a copper-containing protein in the blood of many invertebrates that carries oxygen, giving the blood a blue color

genus

a scientific grouping of closely related species that share common characteristics

invertebrate

an animal without a backbone, such as an insect, worm, or octopus

biodiversity

the variety of all living species in a particular habitat or on Earth as a whole

distribution

the natural geographic range of areas where a species is found

Level 4 - Advanced

A decade-long detective story reached a spectacular chromatic conclusion on May 25, 2026, when Field Museum invertebrate zoologist Janet Voight and colleagues published the formal description of Microeledone galapagensis in Zootaxa -- a golf-ball-sized, vivid-blue octopus retrieved from 1,779 metres depth near Darwin Island in the northern Galapagos Archipelago by the remotely operated vehicle Hercules aboard E/V Nautilus in July 2015. The single female holotype -- collected alongside video footage of two conspecifics that escaped capture -- was preserved in the Field Museum's wet collection for nine years while scanning technology matured to the point where its internal anatomy could be characterised without destructive sectioning.

Micro-computed tomography at the museum's CT laboratory generated isotropic voxel volumes at 12-micrometre resolution, yielding reconstructions of the suckers, branchial hearts, oviducal glands, and digestive gland sufficient to anchor the species within Microeledone -- a genus previously known only from the South Atlantic and sub-Antarctic. The formal description rests primarily on the arm-sucker formula, the absence of a caruncle, and distinctive chromatophore patterning in the dorsal mantle, but Voight is careful to note that a single-specimen description is inherently provisional pending the recovery of additional material.

The animal's conspicuous blue colouration is almost certainly a consequence of high haemocyanin concentration in the haemolymph: the copper-metalloprotein, which plays the oxygen-transport role that haemoglobin fills in vertebrates, imparts a blue-green tint to cephalopod blood and, when tissue perfusion is dense enough, to the mantle itself. What remains unclear is whether the colouration serves any communicative or cryptic function in the 1,800-metre aphotic zone, or whether it is a neutral pleiotropic consequence of haemocyanin expression levels selected for hypoxia tolerance at depth.

Biogeographically, the find plugs a conspicuous lacuna: no deep-sea octopod had previously been formally described from the eastern equatorial Pacific between the Juan de Fuca Ridge and the Humboldt Current system, a region whose deep-sea faunal inventory is impoverished relative to the western Pacific and Atlantic margins despite the presence of the Galapagos Spreading Center and the Carnegie Ridge chain. Voight acknowledged that the broader lesson is one of taxonomic humility: if a charismatic, golf-ball-sized, brilliantly blue octopus can remain undescribed for a decade in one of the most celebrated marine protected areas on earth, the true scale of deep-ocean biodiversity loss to trawling and mining disturbance may be entirely invisible to the species descriptions published each year.

conspecific

belonging to the same species as the specimen being described

isotropic voxel

a three-dimensional pixel of equal dimensions in all directions, enabling uniform resolution in CT reconstructions