Puffer Fish

  • IASbaba
  • November 9, 2022
  • 0
Environment & Ecology
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In news: A group of animal biologists at the Institute of Transformative Bio-Molecules (ITbM) at Nagoya University in central Japan, have identified the pheromone involved in the mechanism that triggers puffer fish to spawn (release/deposit eggs) on beaches using moonlight.


  • Along coastlines around the world, at the time of the spring tide, thousands of puffer fish gather at the water’s edge and perform a writhing motion as they spawn. These fish are known as ‘semilunar spawners’.
  • Puffer fish display a synchronised beach-spawning behaviour.
  • This is due to release of a pheromone PGE2 into the seawater by the spawning puffers.
  • Spring tide means a tide just after a new moon or full moon.

Puffer Fish (or Blow Fish):

  • These clumsy swimmers fill their elastic stomachs with huge amounts of water (and sometimes air) and inflate into a ball shape to evade predators.
  • Most pufferfish contain a toxic substance that makes them foul tasting and potentially deadly to other fish. The toxin is deadly to humans.
  • Most puffers are found in tropical and subtropical ocean waters, but some species live in brackish and even fresh water.
  • Threat: pollution, habitat loss, and overfishing

Source: The Hindu

Previous Year Question

Q.1) Which one of the following is a filter feeder? (2021)

  1. Catfish
  2. Octopus
  3. Oyster
  4. Pelican


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