For some time now, I am writing dolphin facts, but I forgot to add the answer at the first question about dolphins: What are dolphins?

Are dolphins fish? Let’s see. Fish are cold blooded, they breathe through gills they reproduce laying eggs and they don’t have hair but scales.

No, dolphins are mammals as humans are. They like to communicate, are social, reproduce and nurse their calves from mammary glands. They are also warm blooded, just like us. They breatheair just like as not through gills like fish. They do have hair :); a tiny amount of hair around the blowhole.

They belong to Cetaceans that are mammals, just like whales and porpoises. Dolphins are “toothed whales” ☺ and their group have different species as well.

Oceanic dolphins have 30+ species:

  • Melon-headed whale, Peponocephala electra
  • Orca (killer whale), Orcinus orca
  • Pygmy killer whale, Feresa attenuata
  • False killer whale, Pseudorca crassidens
  • Long-finned pilot whale, Globicephala melas
  • Short-finned pilot whale, Globicephala macrorhynchus
  • Long-beaked common dolphin, Delphinus capensis
  • Short-beaked common dolphin, Delphinus delphis
  • Northern right whale dolphin, Lissodelphis borealis
  • Southern right whale dolphin, Lissodelphis peronii
  • Pacific humpback dolphin, Sousa chinensis
  • Indian humpback dolphin, Sousa plumbea
  • Atlantic humpback dolphin, Sousa teuszii
  • Tucuxi, Sotalia fluviatilis
  • Costero, Sotalia guianensis
  • Atlantic white-sided dolphin, Lagenorhynchus acutus
  • Dusky dolphin, Lagenorhynchus obscurus
  • Hourglass dolphin, Lagenorhynchus cruciger
  • Irrawaddy dolphin, Orcaella brevirostris
  • Australian snubfin dolphin, Orcaella heinsohni
  • Atlantic spotted dolphin, Stenella frontalis
  • Clymene dolphin, Stenella clymene
  • Pantropical spotted dolphin, Stenella attenuata
  • Spinner dolphin, Stenella longirostris
  • Striped dolphin, Stenella coeruleoalba
  • Rough-toothed dolphin, Steno bredanensis
  • Common bottlenose dolphin, Tursiops truncates – best known dolphin
  • Indo-Pacific bottlenose dolphin, Tursiops aduncus
  • Burrunan dolphin, Tursiops australis
  • Chilean dolphin, Cephalorhynchus eutropia
  • Commerson’s dolphin, Cephalorhynchus commersonii
  • Heaviside’s dolphin, Cephalorhynchus heavisidii
  • Hector’s dolphin, Cephalorhynchus hectori
  • Risso’s dolphin, Grampus griseus
  • Pacific white-sided dolphin, Lagenorhynchus obliquidens
  • Peale’s dolphin, Lagenorhynchus australis
  • White-beaked dolphin, Lagenorhynchus albirostris
  • Fraser’s dolphin, Lagenodelphis hosei

 

River dolphins have 4 species:

 

More about each of them in later articles.

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