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New Jersey Scuba Diving

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New Jersey Scuba Diving

Sea Turtles

Higher Animals

There are few marine reptiles, and even fewer in the cold North Atlantic. While it would be possible for a salt-water crocodile to swim up from the Caribbean, there is no record of one ever having done so. Nor are there any of the sea-snakes that are famous in the South Pacific. The only marine reptiles that are encountered in our waters are sea turtles.

The one exception to this is the little Diamondback Terrapin, Malaclemys terrapin. (right) This small turtle ( about 6 inches ) is found only in salt marsh environments. Adults are very strong swimmers, and have even been noted in ocean surf, although I don't think they venture offshore.

The Diamondback Terrapin was well on it's way to extinction in the early part of the 20th century owing to it's popularity as a gourmet item. Oddly enough, it was saved by Prohibition in the 1930s, since the recipe for terrapin required wine, which was no longer available. Fortunately for the Diamondbacks, the taste for them did not redevelop after Prohibition was repealed, and they have made a strong recovery.

Tortoise-Shell

Tortoise-shell is a material produced mainly from the shell of the hawksbill turtle, an endangered species. It was widely used in the 1960s and 1970s in the manufacture of items such as combs, sunglasses, guitar picks and knitting needles. In 1973, the trade of tortoise-shell worldwide was banned under CITES ( the Convention on International Trade in Endangered Species. )

Tortoise-shell was attractive to manufacturers and consumers because of its beautiful appearance and its durability, and its organic warmth against the skin. It was used in guitar picks because it can be easily shaped, has excellent bending properties, and is very durable - tortoise-shell picks could sometimes be used for years. Pique work, jewelry made from tortoise-shell inlaid with precious metals in patterns or pictures, was made during the Victorian Era and was highly prized.

There have been a number of faux tortoise-shell materials developed since the 1970s, most of which mimic the appearance of tortoise-shell. Tortex is a material that was created to replace tortoise-shell guitar picks and has been widely accepted as a suitable substitute. ( Text and images directly from Wikipedia )

Tortoise-shell pick guards on guitars were common during the 60's and 70's. The material is not real tortoise shell, but a nitrocellulose plastic, usually laminated to a multi-layer vinyl base, as shown close-up at right. Notice the decorative striping that results from beveling the edges of the lamination.

Once, even cheap guitars came with beautiful pick guards like this, but today the special plastic that gives the lovely translucent tortoise-shell effect is quite rare and expensive. It seems to be sourced from overseas; I have found it imported from Italy. Today, most guitars come with plain plastic mono-colored pick guards.

Nitrocellulose has been replaced by modern plastics for a number of reasons. It is highly combustible, even explosive. When used for these purposes, it is known as flash paper or guncotton. Also, nitrocellulose dries and shrinks with age, often resulting in cracking and tearing around fasteners. And finally, as I said, it is expensive - a roughly square-foot piece can cost as much as $40, while an equivalent piece of vinyl ( like a floor tile ) would be pennies. There are cheaper imitations, and I have even seen photo-printed tortoise-shell patterns, but if you want that real classic look, there's only one way to go !



Loggerhead Turtle

Sea Turtles

Caretta caretta

Size: to 40" ( shell ) and 300 lbs.

Habitat: oceanic

Notes: Loggerhead turtles feed primarily upon bottom-dwelling invertebrates. Compared to Greens, Loggerheads have proportionately larger heads and jaws. They are the most common sea turtles in our waters, and the only type that is not endangered.

The most abundant of all the marine turtles, these handsome creatures reach 4- 5 feet in length and weigh up to 400 - 500 pounds. Loggerheads are reddish brown on the back and orange - yellow underneath. They often acquire barnacles and seaweed growing on their shells.

These turtles once nested throughout the tropics and as far north as Maryland in the US. Although they are still quite numerous, their nesting range has diminished as man has invaded coastal areas for housing and recreation. Several large nesting beaches in Florida and the Carolinas can still be found, and attempts by local residents to patrol beaches to protect nesting females and hatchlings are paying off.

Juvenile loggerheads regularly inhabit Long Island Sound and the eastern bays where they feed mainly on crustaceans and shellfish. Some adults can be found along the ocean shore and in New York Harbor. As with all sea turtles, loggerheads are long lived. A mature female loggerhead was documented to live 33 years in captivity, while estimates of their life expectancy range up to 60 - 75 years or more.


Leatherback Sea Turtle

Sea Turtles

Dermochelys coriacea

Size: to 70" and 1200 lbs.

Habitat: oceanic

Notes: The largest sea turtle in the world, and also the most likely to be seen in our cold waters, since Leatherbacks are at least partially warm-blooded ! As implied by the name, they have a leathery flexible covering, rather than the bony hard shell of all other sea turtles - a unique feature which has caused them to be placed in a family of their own, apart from all other sea turtles. Leatherbacks feed on jellyfish.


Green Sea Turtle

Sea Turtles

Chelonia midas

Size: to 48" ( shell ) and 450 lbs.

Habitat: oceanic

Notes: Greatly reduced in numbers due to hunting. The Green is the largest hard-shelled sea turtle, and also the only vegetarian, feeding on algea and "Turtle Grass." Green Sea Turtles are not particularly green on the outside, but have green fat, for which they were named in the days when sailors still caught and ate them. Green Sea Turtles have four large scales or "scutes" along each side of the shell; Loggerheads have five.


It's not dead, it's just lazy. A Green Sea Turtle lying on a black sand beach in Hawaii.


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Disclaimer:

I make no claim as to the accuracy, validity, or appropriateness of any information found in this website. I will not be responsible for the consequences of any action that is based upon information found here. Scuba diving is an adventure sport, and as always, you alone are responsible for your own safety and well being.

Copyright © 1996-2016 Rich Galiano
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