Before mining the ocean floor, scientists found 24 unknown creatures at 4,000 meters — including an entire superfamily that science had never seen before.

Written by Douglas Avila

Published on 16/04/2026 at 06:47

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Publication in ZooKeys describes 24 amphipods, a new superfamily Mirabestioidea, a new family, and two new genera found at 4,000 meters between Hawaii and Mexico — in an area of 6 million km² marked for deep-sea mining

Scientists have just described 24 new species of amphipods — small shrimp-like crustaceans — on the bottom of the Pacific Ocean.

The creatures live at about 4,000 meters depth in the Clarion-Clipperton Zone (CCZ), a vast area between Hawaii and Mexico.

The CCZ spans 6 million square kilometers. It is larger than the entire India. And it is marked for deep-sea mining.

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An entire superfamily that had never been seen

These are not just new species. Scientists described a new superfamily: Mirabestioidea.

They also identified a new family (Mirabestiidae) and two new genera. It is a rare taxonomic discovery.

The found amphipods have cone-shaped mouths adapted to the extreme environment. They are different from any known crustacean.

The diversity found suggests that the CCZ is a biodiversity hotspot on the ocean floor.

And all of this was cataloged before mining companies began to explore the region.

The numbers of the discovery

New species: 24 amphipods
New superfamily: Mirabestioidea (unprecedented)
New family: Mirabestiidae
New genera: 2
Depth: ~4,000 meters
Area of the CCZ: 6 million km²
Location: between Hawaii and Mexico, Pacific
Publication: ZooKeys (special edition)

The discovery raises an uncomfortable question: how many species will be destroyed before they are discovered?

Deep-sea mining seeks polymetallic nodules — rocks rich in manganese, cobalt, and nickel on the seabed.

The collection process disturbs the sediment and destroys habitats. Species that have lived there for millions of years may disappear.

Polymetallic nodules on the ocean floor in the Clarion-Clipperton zone — The CCZ is rich in polymetallic nodules — and mining could destroy species before they are cataloged — Illustrative image

Why this matters for the future of the oceans

Pre-mining cataloging serves as a scientific baseline. If mining begins, it will be possible to measure the impact.

Without this record, species would disappear without science even knowing of their existence.

The International Seabed Authority (ISA) has been debating the rules for mining in the CCZ for years.

Environmentalists argue that deep biodiversity is irreplaceable. Companies argue that the minerals are essential for batteries and clean energy.

Those following the environmental debate know that sustainability and mining are forces in constant tension.

Map of the Clarion-Clipperton zone between Hawaii and Mexico in the Pacific — The Clarion-Clipperton Zone covers 6 million km² and is targeted by deep-sea mining companies — Illustrative image

Crucial discovery, but limitations exist

The 24 amphipods are just a fraction of the biodiversity of the CCZ. Thousands of species may exist without ever having been cataloged.

The collection was made at specific points. Vast areas remain unexplored by science.

The decision to start mining or not depends on international negotiations. There is no consensus among the 167 member countries of the ISA.

Information compiled from a study published in ZooKeys and a report from UAI Notícias. The data reflects recent scientific publications.

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Before mining the ocean floor, scientists found 24 unknown creatures at 4,000 meters — including an entire superfamily that science had never seen before.

Publication in ZooKeys describes 24 amphipods, a new superfamily Mirabestioidea, a new family, and two new genera found at 4,000 meters between Hawaii and Mexico — in an area of 6 million km² marked for deep-sea mining

An entire superfamily that had never been seen

The numbers of the discovery

Why this matters for the future of the oceans

Crucial discovery, but limitations exist

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Before mining the ocean floor, scientists found 24 unknown creatures at 4,000 meters — including an entire superfamily that science had never seen before.

Publication in ZooKeys describes 24 amphipods, a new superfamily Mirabestioidea, a new family, and two new genera found at 4,000 meters between Hawaii and Mexico — in an area of 6 million km² marked for deep-sea mining

An entire superfamily that had never been seen

The numbers of the discovery

Why this matters for the future of the oceans

Crucial discovery, but limitations exist

Seen from space, an image taken by an astronaut shows an unlikely oasis in the Saudi Arabian desert, protected by a terrain that slows the advance of sand, surrounded by green circles, remnants of an extinct lake and nearly 10,000 years of preserved history.

While the U.S. still faces limitations in deep space, China is developing unprecedented technology with strategic satellites that maintain communication with the far side of the Moon and aims for dominance by 2030.

In Botswana, a salt flat of up to 16,000 km² that was once an African megalake spends months as an absolute white desert, but during the rainy season it transforms into a shallow sea that reappears from nowhere and can be seen from space in the middle of southern Africa.

The Blood Falls of Antarctica hide a living ecosystem trapped under the ice for over 2 million years, where microbes survive without light, without oxygen, and without ever having seen the Sun.

Bavarian archaeologists unearthed a medieval skeleton that had an articulated iron hand in place of its left arm, and the discovery reveals that doctors were already creating sophisticated prosthetics over 500 years ago.

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