Sunday 14 June 2015

Megalops atlanticus

Megalops atlanticus, commonly known as tarpon or "the silver king" is a predatory fish known for its large silver scales and migration across the Atlantic from Africa to lower regions of North America and parts of central and South America. They are particularly common in boca grande, Florida and tortuguero, Costa Rica.They are a prized gamefish because of their armor like mouth, big jumps out of the water, and sheer fighting ability.They vary in size but as adults can easily reach over 200 pounds and six feet in length.  They start their lives in relatively anoxic waters such as rivers and estuaries to avoid predators. They are especially adapted for their environment through the use of their swim bladder. They can literally "gulp" air from the surface in order to survive these conditions. Juvenile tarpon eat shrimp, copepods and a variety of worms. As adults they eat a variety of schooling bait fishes and crustaceans.  Their mouth and eyes are tapered towards the top of their body enhancing their ability to catch prey in the middle to top of the water column but it doesn't deter them from grabbing benthic creatures such as blue crabs as well. The bony and tapered jaw structure allows for them to inhale their prey whole, which limits what they can eat but they are still well suited for their environment. While they are referred to as "silver kings" they are not the apex predators for their environment. Sharks, especially hammerheads  prey on tarpon when they get the chance. While they are sought after recreationally by humans they are not particularly edible because of how bony and scaly they are. Overall, tarpon are high up on the tropic level but not apex predators that are well suited for their environment. They play an important role in limiting baitfish and crustacean populations in different marine environments as well as being a food source for some of the apex predators of marine ecosystems.  

http://lemonbayconservancy.org/another-ramble-at-wildflower-preserve-nov-19-2010/

http://www.saltyshores.com/images/20090718-D33_4556.jpg

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