Lifeform Blogging
BBC: Scientists have discovered the world’s smallest fish…
Researchers have found one of the smallest known fish on record in the peat swamps of the Indonesian island of Sumatra.
Individuals of the Paedocypris genus can be just 7.9mm long at maturity, scientists write in a journal published by the UK’s Royal Society.
But they warn long-term prospects for the fish are poor, because of rapid destruction of Indonesian peat swamps.
The fish have to survive in pools of acid water in a tropical forest swamp.
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Paedocypris can sustain their small bodies grazing on plankton near the bottom of their water pools.
To keep their size down, the fish have abandoned many of the attributes of adulthood – a characteristic hinted at in their name.
Their brain, for example, lacks bony protection and the females have room to carry just a few eggs.
The males have a little clasp underneath that might help them fertilize eggs individually.
Being so small, the fish can live through even extreme drought, by seeking refuge in the last puddles of the swamp; but they are now threatened by humans.
“This is one of the strangest fish that I’ve seen in my whole career,” said Ralf Britz, a zoologist at the Natural History Museum in London, UK.
“It’s tiny, it lives in acid and it has these bizarre grasping fins. I hope we’ll have time to find out more about them before their habitat disappears completely.”
