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Lost nets become entangled on a coral reef in the NW Hawaiian Islands, doing damage for decades. Wave action on the net breaks pieces of coral off until the net breaks, when it is free to catch on new reefs and do more damage.
Photo

Lost Nets Hurt Coral Reefs

The impacts of derelict fishing gear on the Northwest Hawaiian Islands coral reef...
A live coral polyp with turquoise tissue and brown tentacles closes its mouth (the slit at the center of the radiating ribs) tight.
Photo

Closed-Mouth Coral

A live coral polyp with turquoise tissue and brown tentacles closes its mouth (the...
Beating Cilia of Comb Jelly Combs
Photo

Sea Gooseberry Larva

These beautiful wisps are the hair-like cilia of a sea gooseberry larva, a common...
Tiny sponge spicules.
Photo

Sparkling Sponge Spicules

These sparkling sponge spicules are microscopic needle-like structures that many...
Corallimorpharian
Photo

Soft Coral Close-Up

These neon balloons weren't blown up for a party: they are the colorful tentacles...
A close-up of tiny teeth on the common whelk's radula.
Photo

A Snail's Rainbow Radula

This abstract image is a close-up of the tiny teeth that cover the radula of a...
A many-armed, orange starfish.
Photo

A Filter-Feeding Starfish

An orange brisingid starfish sits on a large reef of Lophelia pertusa, cold-water...
A transparent ctenophore with two long tentacles.
Photo

Arctic Ctenophore with Long Tentacles

Dryodora glandiformis is a ctenophore found in Arctic and Northern European waters,...
Comb jellies (such as this Bolinopsis species) are named for their combs: the rows of cilia lining their bodies that propel them through the ocean.
Photo

Ctenophore Combs - Close Up

Comb jellies (such as this Bolinopsis species) are named for their combs: the rows...
A translucent arctic comb jelly.
Photo

Arctic Comb Jelly

The Arctic comb jelly or sea nut (Mertensia ovum) is commonly found in the surface...
The toothy goby or common ghost goby (Pleurosicya mossambica) has a commensal relationship with soft corals and sponges in the Indo-Pacific ocean.
Photo

Toothy Goby in Coral

The toothy goby or common ghost goby (Pleurosicya mossambica) lives among soft...
Stephanocyathus (A.) spiniger, a solitary, deep-water stony coral species, has six long spines that slow it from sinking into soft substrates.
Photo

Solitary Deep-water Corals

These corals from the Smithsonian collections are Stephanocyathus (A.)...

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