questionedithistorytranslations

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.
Paul Caspack
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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
flagthe Netherlands
0%
8%
4%
88%
25
flagGreece
9%
6%
3%
80%
31
flagAustralia
5%
11%
1%
78%
52
flagthe United States
11%
5%
4%
76%
617
flagRussia
6%
9%
3%
76%
221
flagGermany
12%
6%
3%
75%
575
flagPoland
11%
7%
4%
74%
13891
flagthe United Kingdom
8%
8%
4%
74%
235
flagUnknown
12%
9%
3%
74%
31
flagUkraine
8%
10%
4%
73%
394
flagAustria
10%
8%
4%
73%
94
flagCanada
10%
10%
6%
73%
30
flagSpain
0%
13%
8%
73%
23
flagthe Philippines
6%
15%
3%
72%
33
flagSwitzerland
19%
1%
3%
70%
62
flagBelarus
10%
19%
4%
65%
47
flagKazakhstan
8%
20%
2%
65%
35
flagMalaysia
7%
15%
3%
65%
26
flagPakistan
15%
9%
3%
63%
33
flagIndia
13%
12%
8%
59%
372

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