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What are Amphipods?

Nov. 4, 2025

Two new species of marine amphipods, Grandidierella geetanjalae and Grandidierella khambhatensis, have been found by a team of researchers from Chilika and the Gulf of Khambhat, recently.

About Amphipods:

  • They are a type of small crustacean.
  • They are related to crabs, lobsters, and shrimp.
  • They can be found in almost all water environments.
  • They live in the ocean, in fresh water, and even on land.
  • The name ‘amphipoda’ means "different-footed."
    • This is because they have many different kinds of legs.
    • Unlike some other crustaceans, their legs are not all the same.
  • There are over 7,000 known species of amphipods. Most of them belong to a group called Gammaridea.
  • Amphipods can be very tiny, about 0.1 centimeters (0.04 inches) long. But some can grow quite large, up to 34 centimeters (13 inches).
  • Most amphipods eat tiny bits of dead plants and animals. Some are also scavengers, eating what they find.
  • They live in many places.
    • About 750 species live in caves.
    • Some amphipods are terrestrial animals, like sandhoppers.
    • The largest amphipods live deep down on the sea floor. They can be found seven kilometers (about 4.3 miles) deep.

About Grandidierella geetanjalae and Grandidierella khambhatensis:

  • They are two new species of marine amphipods.
  • Grandidierella geetanjalae was collected from the Chilika lagoon near Rambha in Ganjam district, Odisha.
  • Grandidierella khambhatensis was collected from the Gulf of Khambhat, Gujarat.
  • Both species measure between 5.5 and 6 mm in length.
  • They are detritivorous, feeding primarily on organic matter and playing an important role in maintaining ecosystem health by contributing to natural cleaning processes.

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