Utente:BlackPanther2013/Sandbox/rapaci: differenze tra le versioni

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== Pesci epipelagici ==

{{Doppia immagine verticale|destra|Bluefin-big.jpg|Herring2.jpg|220|I grandi pesci predatori epipelagici, come questo [[Thunnus thynnus|tonno rosso]], hanno una coda profondamente biforcuta e un corpo liscio affusolato a entrambe le estremità, con una colorazione controombreggiata e tonalità argentate.|I piccoli [[Pesce azzurro|pesci azzurri]] epipelagici, come questa [[Clupea harengus|aringa]], condividono caratteristiche corporee simili a quelle dei pesci predatori descritti sopra.}}

{{multiple image

| align = right

| direction = vertical

| width = 220

| image1 = Bluefin-big.jpg

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| caption1 = Large epipelagic [[predator fish]], such as this [[Atlantic bluefin tuna]], have a deeply forked tail and a smooth body shaped like a spindle tapered at both ends and [[countershading|countershaded]] with silvery colours.

| image2 = Herring2.jpg

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| caption2 = Small epipelagic [[forage fish]], such as this [[Atlantic herring]], share similar body features as the predator fish described above.

}}

Epipelagic fish inhabit the [[epipelagic zone]], the uppermost layer of the [[water column]], ranging from [[sea level]] down to {{cvt|200|m|ft}}. It is also referred to as the ''surface waters'' or the ''sunlit zone'', and includes the [[photic zone]]. The photic zone is defined as the surface waters down to the depth where the sunlight is [[attenuation|attenuated]] to 1% of the surface value. This depth depends on how [[turbid]] the water is, but can extend to {{Convert|200|m|ft|abbr=on}} in clear water, coinciding with the epipelagic zone. The photic zone allows sufficient light for [[phytoplankton]] to [[photosynthesize]].<ref name="Moyle571"/>