More Crustaceans

Ghost crabs are often seen scuttling quickly along beaches at night, when they emerge from their burrows to feed, and can be difficult to photograph in the wild. They are common in Moorea, an island...
The sargassum is coated with encrusting organisms, such as bryozoans and hydroids, that use it as a perch to filter feed in the oceanic waters, as well as crustaceans such as thos swimming crab...
The waters of New Guinea teemed with exotic fishes and crabs, which were faithfully depicted by William Dampier’s artist. When Dampier’s book A Voyage to New Holland was published in 1703,...
The yeti crab ( Kiwa hirsuta ), an unusual, hairy crab with no eyes, was discovered in 2005 on a hydrothermal vent near Easter Island. It represents not only a new species but also a new genus— Kiwa...
A squat lobster and blackbelly rosefish find shelter on a Lophelia pertusa coral reef off the southeastern United States. The Johnson-Sea-Link submersible captured this image in 2009. Explore more in...
This magnified photo provides a close-up look at copepods—tiny crustaceans that right whales feed on. There are many species of copepods that live throughout the water column, from floating at the...
This swimming crab ( Liocarcinus holsatus ) has a parasitic barnacle rooted in its reproductive system. This invasion cuts off all reproduction for an infected crab and can even cause a male crab to...
These watercolor sketches of Trapezia crabs were drawn by Frederick Bayer, a former Smithsonian coral biologist, in 1947. Trapezia crabs live on and within corals, feeding on their tissue and mucus,...
The Smithsonian's Department of Invertebrate Zoology has a collection of over 57,000 specimens from over 5,700 sites in the Gulf of Mexico, which are now catalogued on Google Earth . Below is a tiny...
When this tusk shell was brought up from the deep reef, it was a surprise when a hermit crab poked out! Notice the hermit crab's large claw that it can use to tightly cover the shell opening when it...
This giant isopod (a crustacean related to shrimps and crabs) was collected from the cold, deep waters of the Gulf of Mexico in 2006. Scientists believe that it is one of about nine species in the...
This brightly colored squat lobster collected in Moorea is a common find among the coral heads. Although called lobsters, this group of crustaceans is more closely related to hermit crabs than to...
Isopods (small, shrimp-like animals) like this one ( Gnathia aureusmaculosa ) are the mosquitoes of the sea, sucking the blood of fish while they sleep. Find out more in " No Fouling Around " from...
Acorn barnacles ( Balanus crenatus ) make a home on the carapace of an edible crab ( Cancer pagurus ). Much of the Baltic suffers from eutrophication that leads to oxygen depletion. The algae blooms...
What can students do to help the ocean? It turns out, a lot! These students from California are among dozens from the U.S. and Mexico who are developing action plans on ocean and climate-related...
A mantis shrimp ( Odontodactylus scyllarus ) holds her clutch of eggs in her clubbed claws. Usually these claws are weapons that punch hard-shelled prey at speeds of more than 50 miles an hour...
This tiny, shrimplike creature is no more than 2.5 centimeters (1 inch) long, but it’s as ferocious as a shark. Its giant eyes spot prey. Huge claws grab the prey, and a tiny mouth rips it to shreds...
This halimeda crab’s disguise did not fool researchers in Moorea where it was collected. These crabs cover themselves with the green algae of halimeda for camouflage.
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