Neophocaena phocaenoides

Common Name:Indo Pacific finless porpoise

Finless Porpoise
Neophocaena phocaenoides Miyajima Aquarium Japant

At Miyajima Public Aquarium, Japan

Neophocaena size.svg

Size comparison against an average human

Conservation Status
Neophocaena Status iucn3.1 VU.svg

Vulnerable (IUCN 3.1)[1]

Scientific Classification
Kingdom Animalia
Phylum Chordata
Class Mammalia
Subclass Eutheria
Order Cetacea
Suborder Odontoceti
Family Phocoenidae
Genus Neophocaena
Species N. phocaenoides
Binomial Name
Neophocaena phocaenoides
(G. Cuvier, 1829)

Neophocaena Dugong range

Finless Porpoise range.

Source: Wikipedia

General Description:The finless Porpoise, like the Irrawaddy dolphin (Orcaella brevirostris), is said to present the appearance of a small Beluga. The melon is rounded, and there is no beak. The mouthline is curved upwards towards the eye. Behind the blowhole is a slight depression, like a neck crease. The animal enjoys flexibility of this neck, and the head can be rotated freely. Interestingly, this flexibility is also a characteristic of the beluga, which is classified in a different family.The dorsal fin is completely absent, and an area of the skin behind where the fin should be, is dark and covered with small rounded projections or tubercles. The finless porpoise’s flippers are relatively long with blunt tips. The colour is uniform grey-black, often with a bluish tinge and a lighter off-white ventral surface. The lips and chin of this animal are lighter. Juveniles and new born calves are slightly lighter grey in colour than the adults, with white lips and some white colouration around the genital regions. In general, porpoises have a smooth appearance, which gives them the local name of Buliya or Bulga (the smooth or slippery one) in Sindhudurg, Maharashtra. The name ‘Finless Black Porpoise’ was also once widely used for this species. This is not very apt, as the porpoise turns black only after death.

Neophocaena Porpoise

Size: Finless Porpoises grow to a maximum length of about 1.9 m. They weigh 30 to 45 kg.

Appearance At Sea: Generally found in pairs, groups of up to 10 Finless Porpoises are sometimes seen. Young calves are said to travel clinging to their mothers' backs.The Finless Porpoise is said to make a chirping sound, this being one of the reasons for its Malayalam name Eleyan eedi.

While breathing they rise so that they just touch the surface with their blowholes. The lack of dorsal fin makes it look as though the back is submerged but it in fact reaches the surface enough to reveal the absence of the fin.

After 3-4 abrupt breaths the porpoises dive for 45-75 seconds, often surfacing around 100m away. They are quick and lively underwater, swimming just beneath the surface with sudden, darting or circling movements.

Neophocaena Porpoise2


Found In:These porpoises inhabit inshore coastal waters and estuaries, and are said to frequent rivers. They can occur quite far from shore (upto 200 km) and in waters upto 100-150 m in depth. They feed mainly on demersal species like small fish, cephalopods and crustaceans. Finless Porpoises are found in the same habitat as humpback dolphins but rarely at the same time.

Records from India: Stranding records confirm the species’ presence across all the coastal states of peninsular India. There are many instances of this porpoise being washed ashore or being found in fishermen’s catches, or entangled in gill nets. These are generally single specimens, but up to 17 animals have been caught together. 

1827 Skulls, an incomplete skeleton and a mounted specimen collected by Dussumier from Malabar coast, in the
Museum National d’Histoire Naturelle,Laboratoire d’Anatomie Comparee.
De Silva, 1987
1866 [?] “Delphinapterus molagen” described by Owen from “Madras”. De Silva, 1987
1908 Several specimens purchased at Trivandrum. Pillay, 1926
[?] Skull and foetus from the mouth of Bombay Harbour in the British Museum (Natural History). De Silva, 1987
[?] Three skulls from the Malabar coast in the Bombay Natural History Society. De Silva, 1987
December 1935 [?] Ten porpoises slaughtered in a lagoon in the Laccadives. Burton, 1940
12 November 1959 Seventeen porpoises landed in a large shore seine and two more together at Malpe on the South Kanara coast.
Four embryos recovered.
Dawson, 1959
12 February 1965 One female caught off Karwar. Devaraj & Sam Bennett, 1974
10 February 1973 One young female specimen caught in gillnet off Calicut. Balan, 1976
1976 Eight caught in gillnets off the Calicut coast. Lal Mohan, 1985
20 February 1980 One caught near the mouth of the Zoari river off Vasco-da-Gama, one foetus recovered. Hafeezullah, 1984
July 1983–December 1986 One male and two females landed at Cochin Fisheries Harbour. Jayaprakash et al., 1995
January–March 1986 Two porpoises washed ashore at Gahirmatha, Orissa coast. James et al., 1989
January–March 1987 Two porpoises washed ashore at Gahirmatha, Orissa coast. James et al., 1989
8 July 1988 One 77 cm long female landed at Mandapam. Nammalwar et al., 1994
11 August 1990 One 1.32 m long female landed at Pillaimadam, near Mandapam. Nammalwar et al., 1994
16 November 1990 One 1.26 m female landed at Verkodu, Rameswaram. Nammalwar et al., 1994
January 1992 Three specimens stranded or washed ashore near Thondi, Tamilnadu, in one week in a 5 km stretch of beach. Ganapathy, 1992
29 January 1992 One immature male, 1.39 m long, collected from Porto Novo during an inshore gillnet operation. Kumaran & Subramanian, 1993
25 October 1992 One 1.32 m long male landed at Agnitheertham, Rameswaram. Nammalwar et al., 1994
1993 [?] One male specimen entangled in gillnets off the Calicut coast. Lal Mohan, 1995
14 September 1995 One young porpoise found washed ashore at Ullal, near Mangalore. Muthiah, 1995

There seem to be few records from Sri Lanka, though a number of strandings have been noted in Pakistan.

World Distribution: The Finless Porpoise is found in coastal waters of the Indo-Pacific, from Pakistan and India to China, Korea and Japan, including South-East Asia and Indonesia. 

Could Be Confused With: There is a possibility of confusion with the Irrawaddy Dolphin Orcaella brevirostris, which also occurs in the same area.

Finless Porpoise Small The shade is more blue than gray. Dorsal fin absent
Irrawaddy Dolphin Relatively large The shade is more gray than blue. Dorsal fin with rounded tip present

Diagnostic Features: At sea, Absence of dorsal fin, rounded melon, absence of beak.

Stranded specimensThe absence of a dorsal fin and beak; jaws with 13 to 22 pairs of spade-shaped teeth in each jaw.