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
25
Greece
31
Australia
51
Russia
220
the United States
607
Germany
555
Poland
13827
the United Kingdom
234
Unknown
31
Ukraine
391
Canada
30
Spain
23
Austria
92
the Philippines
33
Switzerland
61
Kazakhstan
35
Malaysia
26
Belarus
45
Pakistan
33
India
371