Killer whales are mammals and have two internal lungs. They are not fish, and therefore have no gills.
Goldfish do not have lungs. Sorry but they have gills. =) Goldfishes do not have lungs. They have GILLS.
How do male killer whales not mate with his mother or sisters
There are many killer whales in the tropical seas, like here's one that I know, it is a white killer whale, and a false killer whale.
i guess lungs and gills. gills at the earlier stage and lungs at the maturity.
Around 50 or 60 killer whales
How many killer whales were alive ten years ago?
Their population number is currently unknown but the lowest estimate is 50,000 Killer Whales.
Fish breathe with gills. By the way, whales do not. They breathe air, because they are mammals.
Amphibians, such as frogs and salamanders, begin life with gills for underwater breathing and later develop lungs to breathe on land as they mature. This transition from gills to lungs is part of their metamorphosis process.
there are only two
One at a time.
50,000