Box jellyfish have sophisticated eyes with a lens and a retina. How big is its brain?
about the size of a peanut
about the size of a wallnut
about the size of a coconut
jellyfish have no brain
Their speed and vision leads some researchers to believe that box jellyfish actively hunt their prey. Since they have no brain, the mechanisms that could make it happen remain unknown.
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Answers by country
about the size of a peanut
about the size of a wallnut
about the size of a coconut
jellyfish have no brain
answers
the Netherlands
24
Greece
30
Australia
51
Russia
218
the United States
597
Germany
542
Poland
13773
the United Kingdom
233
Unknown
31
Ukraine
390
Austria
90
Canada
30
Spain
23
the Philippines
33
Switzerland
59
Kazakhstan
35
Belarus
45
Malaysia
25
Pakistan
33
India
368