Tag: coral

Why does Nemo the clownfish have three white stripes? The riddle solved at last

Nemo, alias Amphiprion ocellaris, belongs to the clownfish group, which includes about 30 species. Their colour pattern is characterised by a yellow, orange, brown or black colour with vertical white stripes composed of light-reflecting cells called iridophores.

In addition to other physical characteristics, clownfish species are distinguished by their number of vertical white stripes. Thus, some species have no stripes (Amphiprion ephippium), only one (Amphiprion frenatus) or just two (Amphiprion sebae). Amphiprion ocellaris, the famous Nemo, has three stripes. What can explain the difference in the number of bands between these species?

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Global warming, pollution supersize the oceans’ oxygen-depleted dead zones

Vast swaths of the world’s oceans are turning into “dead zones” as global warming and pollution strips them of oxygen, threatening marine life on a massive scale, a new study shows. The analysis, which reviews the major research on ocean oxygen loss, is the first to investigate the causes, consequences and solutions to low oxygen concentrations in the open oceans and coastal waters.

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