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The first known vertebrate fossils, found at the Chengjiang locality in China, date back to the early Cambrian. These early vertebrates, such as Haikouichthys, are small, tapered, streamlined animals showing eyes, a brain, pharyngeal arches, a notochord, and rudimentary vertebrae. Vertebrates appear to have radiated in the late Ordovician, about 450 million years ago. However, most Ordovician fossil fossil vertebrates are rare and fragmentary, although available material suggests that ancestors of the sharks and jawed fish were present along with various lineages of armored jawless fish. By the middle Silurian, about 400 million years ago, the picture is clearer: the armored jawless fish were quite diverse, and the first definite jawed fish had appeared -- the Silurian is sometimes called the "Age of Fishes." By the late Devonian, 360 million years ago, early cartilaginous fish and bony fish were diversifying.
What else can I help you with?
Which class did the vertebrate lung first appear?
In Bony Fish (Osteichthyes)
Why were fish made?
Fish were not created; they evolved from previous ancestors which lived in water. The evolution of fish actually came through different lines, evolutionary speaking, and so there is no common ancestor for all fish.However, many species have ancestors known from many hundreds of millions of years ago (for example, the shark dates from ~450 mya, before any dinosaur species; the Placodermi and Agnatha are two of the earliest classes thought of as fish and are recorded beginning at around 530 mya), while others are only though to have developed tens of millions of years ago (Salmonidae which includes salmon and trout is first known individually around 40 mya).
What fish was thought to be extinct until 1938?
The coelacanth was thought to be extinct until 1938 when one was caught off the coast of South Africa. Previously only known from the fossil record, its discovery was a significant scientific find.
When did the first fish appear?
The early evolution of fish is unclear. It is thought that they evolved in the Cambrian Period (542 - 488 Ma). A primitive fish called Haikouichthys which is commonly recognised as one of the 1st fish to evolve lived around 530 million years ago.
What fish is Saira?
Sauries or Sairas are fish which live in tropical and temperate waters. These fish often jump while swimming near the surface, skimming the water. The jaws of sauries are beak-like, ranging from long, slender beaks to relatively short ones with lower jaw only slightly elongated. The mouth openings of sauries, however, are relatively small and the jaws are weakly toothed. A row of small finlets behind the dorsal and anal fins is also a feature of sauries. An unusual feature of these fish is that they lack swim bladders. Sauries grow to a maximum length of about 46 cm. They are harvested commercially as a food fish. Sauries first appear in the fossil record in the upper Tertiary. Pacific sauries are consumed often in Japanese and Korean cuisine. The fish is usually grilled.
How many years has the coelacanth fish existed?
Coelacanth fish first appear in the fossil record about 410 million years ago.
Can fish have fossils?
Yes, hundreds of species of fish can be found in the fossil record.
Why are few animals known from their fossil record?
Dinosaurs and fish
What were the few bone effects of the jaw less fish in fossil record?
ha
When does the fossil record indicate that fish with jaws appeared?
In the Silurian period, from about 430 - 420 mya
What is the first thing Stanley first finds as he is digging?
a fish fossil
When did fish appear?
Long before people. Since the fish were here first, there is no way to know EXACTLY when fish first appeared.
What is the year the first fossil fish found alive?
it was found in souther china
What would be better to become a fossil a fish or a mouse?
The fish will become a fossil because of the fish bones on his back.
When did fish first appear on earth?
About 475 million years ago
Which class did the vertebrate lung first appear?
In Bony Fish (Osteichthyes)
Which fish is called a living fossil?
The Coeclacanth
