For starlet sea anemones, more food means more arms

A new study finds that starlet sea anemones have the unique ability to grow more tentacles when they've got more to eat.

Credit: Smithsonian Environmental Research Center/Wikimedia
  • These anemones belong to the Cnidaria phylum that continues developing through its lifespan.
  • The starlet sea anemone may grow as many as 24 tentacles, providing there's enough food.
  • When deprived of the chance to reproduce, they also grow more tentacles.
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Some shark species have evolved to walk

The relatively quick evolution of nine unusual shark species has scientists intrigued.

Image source: Mark Erdmann
  • Living off Australia and New Guinea are at least nine species of walking sharks.
  • Using fins as legs, they prowl coral reefs at low tide.
  • The sharks are small, don't be frightened.
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Study: Much of the surface ocean will shift in color by end of 21st century

Climate-driven changes in phytoplankton communities will intensify the blue and green regions of the world’s oceans.

Jennifer Chu | MIT News Office
February 4, 2019

Climate change is causing significant changes to phytoplankton in the world's oceans, and a new MIT study finds that over the coming decades these changes will affect the ocean's color, intensifying its blue regions and its green ones. Satellites should detect these changes in hue, providing early warning of wide-scale changes to marine ecosystems.

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(LN.Vector pattern/Shutterstock)
  • On November 11, seismologists began puzzling over a weird low-frequency rumble that rang the entire planet.
  • The wave coming from somewhere was weirdly simple and tied to no known events.
  • More comprehensive study of an uncharted area of the ocean floor could provide an explanation of the mystery.
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