Underwater LifeMeravi AylinDumitrescu Laurentiu

Dolphins Dolphins are a widely distributed

and diverse group of fully aquatic marine mammals. They are an informal grouping within the order Cetacea,excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae(the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae(the new world river dolphins), and Pontoporiiade (the brackish dolphins). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Certadicyoda with even-toed ungulates, and their closest living relatives are the hippopotamuses, having diverged about 40 million years ago.

Sharks Sharks are a group

of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the cladeSelachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Claudoselache and Xenachantus, as well as other Condricthies such as the holocephaild eugenedntidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Acanthodians are often referred to as "spiny sharks"; though they are not part of Chondrichthyes proper, they are a paraphyletic assemblage leading to cartilaginous fish as a whole.

CoralsCorals are marine

invertebrates in the class Anthozoa of phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.

TurtlesTurtles are reptiles of

the order Testudines (or Chelonii) characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield."Turtle" may refer to the order as a whole (American English) or to fresh-water and sea-dwelling testudines (British English).

The Black Sea

Overall look:The Black Sea is a body of

water between Southeastern Europe and Western Asia, bounded by Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine. It is supplied by a number of major rivers, such as the Danube, Dnieper, Rioni, Southern Bug, and Dniester. The Black Sea has an area of 436,400 km2 (168,500 sq mi) (not including the Sea of Azov), a maximum depth of 2,212 m (7,257 ft), and a volume of 547,000 km3(131,000 cu mi). It is constrained by the Pontic Mountains to the south and by the Caucasus Mountains to the east, and features a wide shelf to the northwest. The longest east-west extent is about 1,175 km (730 mi).

The Black Sea has a positive water balance; that is, a net outflow of water 300 km3 (72 cu mi) per year through the Bosphorus and the Dardanelles into the Aegean Sea. Mediterranean water flows into the Black Sea as part of a two-way hydrological exchange. The Black Sea outflow is cooler and less saline, and floats over the warm, more saline Mediterranean inflow – as a result of differences in density caused by differences in salinity – leading to a significant anoxic layer well below the surface waters. The Black Sea drains into the Mediterranean Sea and then the Atlantic Ocean, via the Aegean Sea and various straits. The Bosphorus Strait connects it to the Sea of Marmara, and the Strait of the Dardanelles connects that sea to the Aegean Sea region of the Mediterranean. These waters separate Eastern Europe and Western Asia. The Black Sea is also connected to the Sea of Azov by the Strait of Kerch.

More at: ://en.wikipedia.org/wiki/Black_Sea

Quiz Time!

Where is the Black Sea located?

• Eurasia• North Ameri

ca• Australia

Correct!Click here for the next question.

Wrong!

Click here to retry.

Which were the 4 animals presented?

• Lion, Burcuta, Catfish, Coral• Shark, Octopus, Dolphin, Clownfis

h• Dolphin, Turtle, Shark, Coral

Correct!Click here for the next question.

Wrong!

Click here to retry.

Did you enjoy this PowerPoint presentation?

• Yes!• Of course!• Yeah!

Correct!Thank you for taking the test!