They can be, but are not normally aggressive towards humans.
Porpoise is a name (in French) for a bottle-nosed Dolphin, so the answer is, No.
No. Sharks are a type of fish. Porpoises are mammals.
Whales, Dolphins, and Porpoises, by Mark Carwardine.
Dolphins are related to whales and porpoises.
The collective nouns are a herd, a school or a pod of porpoises.
I have not found any evidence of telepathy in porpoises. they communicate by sonar like clicks
Porpoises are mammals and so they are warm-blooded like you and I.
They are bottle nose dolphins.
Many think of dolphins as these beautiful sweet creatures, but they do attack and kill porpoises. It has been documented with videos that they like to bully and hurt baby porpoises.
Harbor Porpoises will dive as deep as 656 ft. (200 meters)
Porpoises are more closely related to dolphins than whales. Both porpoises and dolphins are part of the family Delphinidae, while whales are a separate family within the order Cetacea.
Yes, they do.
Porpoises