Posts Tagged With: crustaceans

Creatures in deepest parts of oceans found containing toxins


  • Crustaceans like Hirondellea Gigas, living about 33,000 ft down in the Pacific Ocean are lately found to be polluted by PCBs and PBDE chemicals.
  • Scientists conducted their study by catching creatures in the Mariana Trench in the Western Pacific, which is the deepest point on the seabed.
  • They are shocked by the high levels of poison.
  • Scientists stated that the reason for the high concentration may be the trash or the remains of contaminated fish that sink and build up on sea-beds and provide food for the scavengers.


  • Polychlorinated Biphenyls are a group of persistent organic pollutants (POPs) that were used in electrical equipment and Polybrominated Diphenyl ethers are organobromine compounds used as flame retardants.
  • In 2001, at the Stockholm Convention, the governments of many States decided to outlaw the PCBs because of health and environmental concerns.
  • In 2009, at the Geneva Convention, the PBDEs were also included in the list.


– News post compiled by Ayushi Singh

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New Crustaceans found in Kerala

  • Researchers at the Department of Aquatic Biology and Fisheries, University of Kerala, have found 4 new species of crabs from the Kerala coast.
  • 3 hermit crabs and a new species of pinnotherid crab are part of the discovery.
  • The first of the new hermit crab species namedPaguristes luculentus was collected in Kollam coast.
  • The second speciesDiogenes canaliculatus is named after the longitudinal furrows on the outer surface of the arm of the left chelate leg.
  • The third speciesPagurus spinossior belongs to another hermit crab family Paguridae taken from Neendakara, Kollam.
  • The pinnotherid crab,Afropinnotheres ratnakara found at Kovalam was named after the Indian Ocean in Sanskrit.


  • Hermit crabs are ubiquitous animals often not considered to be ‘true’ crabs as they lack an external shell on their soft abdomen which leaves them vulnerable to predators.
  • They live in abandoned gastropod (snail) shells to protect themselves.
  • Their last two pairs of legs are small and modified and, along with their uropods (appendages at the end of the abdomen), are used to clamp onto the internal whorls of the shell.

News Item Compiled by Adarsh Mohandas

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