There are no birds that only live in the ocean, but penguins are the only kind that spends are large amount underwater, so however how many penguin species there are, then that's your answer :)
There are about 450 different species of birds, 430 different species of fish and including marine animals about 100 different mamals.
That is the correct spelling of "marine species" (there are many for animals and plants).
Much marine life abounds in the swamp (also known as marshland), attracting many avian species, such as herons, egrets, and... ducks.
Seabirds are omnivores. Some seabirds are omnivorous, many others are more specialized, feeding particularly on fish, the species and size of which will depend on the size and species of the bird. So, big birds will eat bigger fish. Other birds feed on marine invertebrates, such as shrimps.
There are 1000 species of birds in South Africa
Birds-86 Mammals-107 Reptile-98 Amphibian-195 Freshwater Fish-530 Marine Fish-226
No. Kiwi are not marine birds. Kiwi are terrestrial birds.
many
About 10,000 types of birds, but there are too many to count!
Many, many, many different variations of birds exist. 10,000 different species and more.
40000
There are about 10,002 species.