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Harbour porpoises tend to be solitary foragers, but they do sometimes hunt in packs and herd fish together. [10] Young porpoises need to consume about 7% to 8% of their body weight each day to survive, which is approximately 15 pounds or 7 kilograms of fish. Significant predators of harbour porpoises include white sharks and killer whales (orcas).
Populations of harbor porpoises in the North and Baltic Seas are under increasing pressure from anthropogenic causes such as offshore construction, ship traffic, fishing, and military exercises. [59] Increasing pollution is a serious problem for marine mammals.
The Black Sea harbour porpoise (Phocoena phocoena relicta) is a subspecies of the harbour porpoise common in the Azov, Black, Marmara, and Aegean Seas. It is the only representative of the family in the fauna of these areas and is considered a narrow-range relict subspecies.
Will enter the Upper Harbor and has been seen off Coney Island. This is the fastest swimming whale found in the estuary. Humpback whale (Megaptera novaeangliae) Among whales, one of the most common visitors to the Harbor as of 2018. Records going back over 300 years are very clear that whales were present in the area in historical times and ...
Swimming off the coast of Mexico in the Gulf of California live the few remaining vaquitas on earth. This endangered cetacean is not only the smallest porpoise species, but the most rare. Where ...
The vaquita (/ v ə ˈ k iː t ə / və-KEE-tə; Phocoena sinus) is a species of porpoise endemic to the northern end of the Gulf of California in Baja California, Mexico.Reaching a maximum body length of 150 cm (4.9 ft) (females) or 140 cm (4.6 ft) (males), it is the smallest of all living cetaceans.
A recent survey using drones showed a 10% decline in the number of sightings of porpoises in 2024. ... dolphins and porpoises that live along the north-west coast of Wales.
Many of the findings that apply to all cetaceans were therefore first discovered in the porpoises. [2] One of the first anatomical descriptions of the airways of the whales on the basis of a harbor porpoise dates from 1671 by John Ray. It nevertheless referred to the porpoise as a fish. [3] [4]