How Do Most Prehistoric Creatures Still live On After BC?

Question

The reason i ask is because Reachers are finding Prehistoric Fish & stuff like that on earth but. do you belive most of them hid in the water deep in the jungle because i am surprise that those animals Survie the blast or what ever killed the Dinosurs.

http://www.youtube.com/watch?v=xry342A-utI

This is wickd i think their are more Prehistoric animals have surviv

But what are your thoughts

Answer 1

Well, if nothing survived the "blast" that killed the dinosaurs, where did you come from?  Your lineage is every bit as ancient as the lineage of the celocanth or the roach.  Life on earth has weathered multiple mass extinctions, but some creatures always managed to survive and form the foundation for the next evolutionary batch of critters.  The difference between animals like humans and animals like "ancient fish" has to do with what traits we all have: ancestral traits VS derived traits.  Ancestral traits are features plants or animals have that remain mostly unchanged even over millions of generations.  These are the traits that have remained in the descendants of species whose ancestors are long extinct.  So, modern animals that retain these ancestral features are called ancient or "living fossils" because their family has preserved very old features.  It does not mean the animal itself is the same sort of creature that lived millions of year ago.  It just kept a lot of the same features its very ancient ancestors did.

Derived traits are new features not seen in ancestral forms.  All ancient mammals were egg layers, for example, but the newest families of mammals give birth to live young.  This is a relatively new feature for mammals.  Platypuses lay eggs because the monotreme line branched off earlier than the therian mammal line did, so monotremes kept a different set of ancestral traits, and developed a different set of derived traits than either the marsupial or placental mammals did.  Because platypuses lay eggs, we say they have an "ancient feature".  Platypuses themselves, however, are not any more ancient than any other modern animal.

When scientists discover "ancient animals" what they are finding is modern members of very old, mostly unchanged families.

Answer 2

No prehistoric animals are still alive.  Rather, there are some species of animal which have a longer history than others.

<<The reason i ask is because Reachers are finding Prehistoric Fish>>

I think you're referring to the coelacanth, /Latimeria/.  It's not in the same genus as any coelacanths known from the fossil record, as far as I'm aware.  It's a late surviving coelacanth, not a "prehistoric" one.