Because the air was too poisonous for animals to be on land. So the bacteria started in the sea. And blue green algae released oxygen into the air. Then the animals started to move from the water to the land.
ampibians
yes
cell form and larva in the water witch grew to fish to monkey to man
Currently, there are about 23,000 fish species, but scientists think there may be nearly double that amount that have not been discovered, yet.
Ichthyologists are scientists that study fish
Scientists know that fish existed before amphibians because fish were found in a lower layer of rock.
fish dont have eyelids
Ichthyologists.
An Ichthyologist studies fish. A zoologist who specializes in fish is called an ichthyologist.
They theorize that during this period the first of three gill arches on a jawless fish evolved into the first jaws.
water horses are not proven real. but the scientists that believe in it think its a reptile that lives in water. sortof like a water snake.
Scientists believe all life began in the water. Micro-organisms, fish and even mammals, e.g. dolphins, whales, seals, etc. Then mammals moved onto the land and began evolving to their surroundings, then man evolved from an ape like creature.