#sharksunday to bring more understanding to humans about sharks. A close up on the eye of a Brownban

#sharksunday to bring more understanding to humans about sharks. A close up on the eye of a Brownbanded bamboo #shark and the spiracle which is the hole behind the eye. This Is a first gil slit and used to provide oxygenated blood directly to the eye and brain through a separate blood vessel. Not all sharks have it for example it is absent or reduced in many sharks, especially the fast swimming sharks and is usually larger and present in sedentary or bottom dwelling sharks. In rays, the spiracle is much larger and more developed and is used to actively pump water over the gills to allow the ray to breathe while buried in the sand. Taken by #Underwaterphotographer #DanielSasse #poseidondivecenter #natgeoyourshot #Scubadiving #Aonang #Krabi #instadive #Marinelifeprotection #Ouroceans #Underwaterphotography #natgeo #nature #uwpic #Savetheoceans #Marineconservation #Oceandefender #Saveourseas #underwaterlife #fish #ecowarrior #natgeowild #blueplanet #scubashooter https://www.instagram.com/p/CWPu95Ov7ZI/?utm_medium=tumblr -- source link
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