There are fully marine mammals and sub-marine mammals, this is only the fully marine mammals (Sirenids and Cetaceans).
Sirenia
There are only 3 manatee species and 1 dugong
Cetacea
There are 96 species of whale, dolphin, beaked whale, and porpoise.
That makes a total of 100 species exactly, but there are still species to discover.
About 206 native species of terrestrial fauna (plus 7 introduced species). Of 206 native species, 117 are endemic. I don't have yet any idea about marine mammals in the Philippines. -------------------------------------------- x_tian_2010
There are many, possibly hundreds of species of mammals in Pennsylvania.
The habitats of mammals are quite diverse depending on the particular species. Most of them are land mammals but there are some which are marine mammals like whales and others which are amphibious like hippos.
The Philippines is home to a diverse range of aquatic species due to its extensive coastline and marine habitats. These species include various fish, corals, marine mammals, and invertebrates, many of which are endemic to the region. The country's rich marine biodiversity supports both ecological balance and livelihoods for local communities.
That is the correct spelling of "marine species" (there are many for animals and plants).
There are almost 6,000 species of mammals.
Birds-86 Mammals-107 Reptile-98 Amphibian-195 Freshwater Fish-530 Marine Fish-226
The only herbivorous marine mammals are the dugong and 3 species of manatees.
FISH, aquatic mammals like sharks, dolphins, and swordfish/jellyfish. millions of species of fish are included in the marine/ocean
Dolphins
There are estimated to be around 427 species of mammals in the Amazon rainforest.
A Marine Mammalogist is someone who studies Marine Mammals.(Whales, Dolphins, Seals, Sharks, etc.,)