Marine Reptiles 7000 living species Poikilotherms Ectotherms
First appeared more than 3MYA
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Sea Turtles An ancient group of reptiles Bodies enclosed in a
carapace Sea turtles cannot retract heads into shell 9 species Must
return to land to reproduce
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Green Turtles, Chelonia mydas Live primarily in warm waters
Shells grow 1m in length Feed on seagrasses and seaweeds Lack
teeth, have strong jaws
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Leatherback Dermochelys coriacea Largest sea turtle May attain
a length of 7ft and weigh 1200lb Have a series of small bones
buried in dark skin An open water, deep diving species Diet
consists of jellyfish Endangered
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Sea Turtle Reproduction All sea turtles must return to land to
reproduce Lay eggs on remote sandy beaches DNA of turtles breeding
in one area differs from DNA of turtles breeding in another area
Females only venture at hight to lay eggs Incubation period is
about 60 days Hatchlings are very vulnerable
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Sea Snakes 55 species Found in the Indian and Pacific Oceans
Most are 3-4 feet Ovoviviparous Carnivores Most common of all
venomous snakes Rarely aggressive
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Other Marine Reptiles Saltwater crocodile Inhabits mangrove
swamps in Eastern Indian Ocean, Australia, Western Pacific islands
Most common on coast Record of one being 33ft, but on average are
20ft. Most aggressive of all marine animals Marine iguana Galapagos
Islands Spends most of its time basing in large groups of rocks
Eats seaweeds Can dive up to 33feet
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Seabirds Seabirds have significant advantages over reptiles
Ability to fly homeotherms Eddotherms Water proof feathers Nest on
land Breed in large colonies Distributed pole to pole 9700 species
Need a lot of food to supply energy to maintain their body
temperatures
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Penguins Flightless birds Bones are denser than any other bird
to make diving easier 18 species All in live in the southern
hemisphere
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Where Penguins Live
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Tubenoses A large group of seabirds with distinctive tube like
nostrils and heavy beaks that are curved They have salt glands to
get rid of excess salt Skilled fliers Scavangers Many breed in the
area of Anarctica Faithful relationships
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Pelicans and Related Birds Webbing between all four toes
Pelicans have a unique pouch below their beaks Nest in large
colonies Deposits of guano are mined for fertilizer Build messy
nests of twigs and whatever else they can find
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Gulls and Related Birds Largest variety of sea birds Will eat
just about anything The Arctic tern wanders 10000 miles during the
year Puffins and razorbills are also related
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Shorebirds Wading birds that do not have webbed feet Many live
inland Common in estuaries and marshes Common examples Plovers
sandpipers
