The large and graceful sea turtles spend their entire lives in the
ocean. The one exception occurs when the females come ashore to lay
their eggs on sandy beaches. Since the turtles use the same beaches year
after year, their nesting habits can be observed by anyone with
patience. After spending a year or more wandering at sea, the hatchlings
return to shallow water to feed on marine grasses. When they are mature
and ready to nest, each female probably returns to the same beach where
it was hatched! Sea turtles are air breathers, but they can stay
submerged for surprisingly long periods. The record seems to be that of
a Leatherback Turtle that was timed while remaining underwater forty one
minutes. Sea turtles can dive to depths of more than 3,000 feet, and
they are famous for swimming enormous distances at sea. Some tagged
individual sea turtles have been found 4,000 miles from their nesting
beaches.
Atlantic
Loggerhead Turtle-
The Atlantic Loggerhead Turtle nests along the Atlantic and
Gulf coasts. This is the most common marine turtle that visits the
Florida coasts. The Atlantic Loggerhead Turtle can be easily recognized
by their reddish brown upper shell that is elongated and heart-shaped,
and by the large head and broad jaws. These loggerhead sea turtles may
reach a length of 4 feet and weigh 170-350 pounds. There are historical
accounts of giant Loggerheads weighing up to 1,000 pounds. Like all sea
turtles, the Loggerheads are diminishing in numbers year after year.
They are currently listed as
threatened in the state of Florida.
Atlantic
Green Turtle -This famous sea turtle is more common in the
Caribbean, although it is often seen swimming off the coasts of South
Florida. One of the principle Atlantic green Turtle's nesting sites is
the Northeast Caribbean coast off of Costa Rica. The Atlantic Green
Turtle has a broad, oval, dark brown or olive shell. This turtles
carapace, or upper shell has no ridge down the center and curves
smoothly from side to side. It grows to a maximum length of 5 feet and
weighs 250-280 pounds. The diet of the Atlantic Green Turtle consists
mainly of turtle grass though it does eat marine invertebrates.
Approximately 100 to 1,000 green turtles nest on
Florida’s beaches each year from June through
late September. Green turtles are found during the day in shallow flats
and seagrass meadows and return every evening to their usual sleeping
quarters—scattered rock ledges, oyster bars, and coral reefs.
Atlantic
Hawksbill Turtle- The Atlantic hawksbill turtle rarely nests in
Florida, preferring the Caribbean beaches. This sea turtle is often seen
by divers in the Florida Keys. The hawksbill turtle's snout looks like a
hawk's beak, and the dark scales on its head have yellow margins. It has
a heart-shaped greenish brown or tan shell with mottling on its head and
flippers. The Hawksbill may reach a length of 3 feet and weigh 165
pounds. Its diet consists mainly of marine invertebrates. The Atlantic
hawksbill turtle is the source of tortoise shell used in making jewelry
and other products. like all sea turtles, the hawksbill swims mostly
with its front flippers, in contrast to freshwater turtles that use both
front and rear flippers.
Leatherback
Turtle- The Leatherback turtle swims great distances at sea.
This turtles eggs are prized in some places as food, but its flesh is
not eaten. Between 40 and 125 nests are reported each spring on the east
coast of Florida. Its major nesting area in the Atlantic are Surinam,
French Guyana, Panama, and Costa Rica. St Croix in the West Indies is
also a well studied nesting site. The leatherback eats jellyfish in very
large quantities, but jellyfish are low in calories and much of the
nourishment may come from the macro plankton trapped in the jelly fishes
tentacles. Because of its smooth, soft skin, the leatherback is not
bothered by the barnacle, algae, and suckerfish which usually attach
themselves to other sea turtles. Leatherbacks are the largest of all
living turtles with adults exceeding six feet in length. Nesting females
are usually under 1,000 pounds, but male Leatherbacks that stay at sea
can reach 3,000 pounds. This sea turtles upper shell is long and
triangular and is generally black with light blue flecks. The
Leatherback has long and powerful flippers.
Atlantic
Ridley Turtle- The Kemp’s Ridley is the rarest sea turtle in
the world and is the most endangered. It has only one major nesting
beach, an area called Rancho Nuevo on the Gulf coast of
Mexico. Fewer than 1,000 nesting females remain in the world.
Kemp’s Ridleys are small, weighing only 85 to 100 pounds and measuring 2
to 2.5 feet in carapace length, but they are tough and tenacious. Their
principal diet is crabs and other crustaceans.
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