Mediterranean Monk Seal

The Mediterranean monk seal (Monachus monachus) is a monk seal belonging to the family Phocidae. As of 2026, it is estimated that between 800 and 1000 individuals survive in isolated subpopulations in the Mediterranean, (especially) in the Aegean Sea, the archipelago of Madeira, and the Cabo Blanco area in the northeastern Atlantic Ocean spanning the border of Mauritania and Western Sahara. It is believed to be the world's rarest pinniped species. It is the only extant species in the genus Monachus, the other two monk seal species being in Neomonachus.

The habitat of this pinniped has changed over the years. In ancient times, and up until the 20th century, Mediterranean monk seals had been known to congregate, give birth, and seek refuge on open beaches. In more recent times, they have left their former habitat and now only use sea caves for these activities. Often these caves are inaccessible to humans. Frequently their caves have underwater entries, and many caves are positioned along remote or rugged coastlines. Scientists have confirmed this is a recent adaptation, most likely due to the rapid increase in human population, tourism, and industry, which have caused increased disturbance by humans and the destruction of the species' natural habitat. Because of these seals' shy nature and sensitivity to human disturbance, they have slowly adapted to try to avoid contact with humans completely within the last century, and, perhaps, even earlier. The coastal caves are, however, dangerous for newborns, and are causes of major mortality among pups when sea storms hit the caves.

Turkey

Mediterranean monk seals are diurnal and feed on a variety of fish, crustaceans, and mollusks, primarily octopus, squid, lobsters, mullets, flatfish, tuna, sardines, and eels, up to 3 kg per day. Although they commonly feed in shallow coastal waters, they are also known to forage at depths up to 250 meters, with an average depth varying between specimens. Monk seals prefer hunting in wide-open spaces, enabling them to use their speed more effectively. They are successful bottom-feeding hunters; some have even been observed lifting slabs of rock in search of prey.

Very little is known of this seal's reproduction. As of 2020, it is thought that there are roughly 500 pairs of monk seals remaining in the world. Scientists have suggested that they are polygynous, with males being very territorial where they mate with females. Although there is no breeding season since births take place year-round, there is a peak in September, October, and November. Although mating will take place in the water, females will give birth and care for the pups on beaches or underwater caves. The use of underwater caves may have begun in order to make predatory actions almost impossible as these caves are difficult to access. Because they will stay with the pups to nurse and protect, they use their stored fat reserves to nurse. Data analysis indicates that only 29% of pups born between September and January survive. One cause of this low survival rate is the timing of high surf around the areas of breeding, creating a threat to young pups. As well, if a female is in an unsafe environment, she may have an abortion, indirectly lowering the population. Because of smaller populations there is an increase in genetic events such as inbreeding and lack of genetic variation. During other months of the year, pups have an estimated survival rate of 71%. In 2008, lactation was reported in an open beach, the first such record since 1945, which could suggest the seal could begin feeling increasingly safe to return to open beaches for breeding purposes in Cabo Blanco. Pups make first contact with the water two weeks after their birth and are weaned at around 18 weeks of age; females caring for pups will go off to feed for an average of nine hours. Most female individuals are believed to reach maturity at four years of age, at which point they will begin to breed. Males begin to breed at age six. The gestation period lasts close to a year. However, it is believed to be common among monk seals of the Cabo Blanco colony to have a gestation period lasting slightly longer than a year.

This species of seal grows from approximately 80 centimetres (2.6 ft) long at birth up to an average of 2.4 metres (7.9 ft) as adults, females slightly shorter than males. Males weigh an average of 320 kilograms (710 lb) and females weigh 300 kilograms (660 lb), with overall weight ranging from 240–400 kilograms (530–880 lb). They are thought to live up to 45 years old; the average life span is thought to be 20 to 25 years old and reproductive maturity is reached at around age four. The monk seals' pups are about 1 metre (3.3 ft) long and weigh around 15–18 kilograms (33–40 lb), their skin being covered by 1–1.5 centimeter-long, dark brown to black hair. On their bellies, there is a white stripe, which differs in color and shape between the two sexes. In females the stripe is usually rectangular in shape whereas in males it is usually butterfly shaped. This hair is replaced after six to eight weeks by the usual short hair adults carry. Adults will continue to molt annually, causing their color vibrancy to change throughout the year. Pregnant Mediterranean monk seals typically use inaccessible undersea caves while giving birth, though historical descriptions show they used open beaches until the 18th century. There are eight pairs of teeth in both jaws. Believed to have the shortest hair of any pinniped, the Mediterranean monk seal fur is black (males) or brown to dark grey (females), with a paler belly, which is close to white in males. The snout is short broad and flat, with very pronounced, long nostrils that face upward, unlike their Hawaiian relative, which tend to have more forward nostrils. The flippers are relatively short, with small slender claws. Monk seals have two pairs of retractable abdominal teats, unlike most other pinnipeds.

Damage inflicted on fishermen's nets and rare attacks on offshore fish farms in Turkey and Greece are known to have pushed local people towards hunting the Mediterranean monk seal, but mostly out of revenge, rather than population control. Preservation efforts have been put forth by civil organizations, foundations, and universities in both countries since as early as the 1970s. For the past 10 years, many groups have carried out missions to educate locals on damage control and species preservation. Reports of positive results of such efforts exist throughout the area. In the Aegean Sea, Greece has allocated a large area for the preservation of the Mediterranean monk seal and its habitat. The Greek Alonissos Marine Park, that extends around the Northern Sporades islands, is the main action ground of the Greek MOm organisation. MOm is greatly involved in raising awareness in the general public, fundraising for the helping of the monk seal preservation cause, in Greece and wherever needed. Greece is currently investigating the possibility of declaring another monk seal breeding site as a national park and also has integrated some sites in the NATURA 2000 protection scheme. The legislation in Greece is very strict towards seal hunting, and in general, the public is very much aware and supportive of the effort for the preservation of the Mediterranean monk seal. The complex politics concerning the covert opposition of the Greek government towards the protection to the monk seals in the eastern Aegean in the late 1970s is described in a book by William Johnson. Oil companies apparently may have been using the monk seal sanctuary project as a stalking horse to encourage greater cooperation between the Greek and Turkish governments as a preliminary to pushing for oil extraction rights in a geopolitically unstable area. According to Johnson, the Greek secret service, the YPEA, were against such moves and sabotaged the project to the detriment of both the seals and conservationists, who, unaware of such covert motivations, sought only to protect the species and its habitat. One of the largest groups among the foundations concentrating their efforts towards the preservation of the Mediterranean monk seal is the Mediterranean Seal Research Group (Turkish: Akdeniz Foklarını Araştırma Grubu) operating under the Underwater Research Foundation (Turkish: Sualtı Araştırmaları Derneği) in Turkey (also known as SAD-AFAG). The group has taken initiative in joint preservation efforts together with the Foça municipal officials, as well as phone, fax, and email hotlines for sightings. Preservation of the species requires both the preservation of land and sea, due to the need for terrestrial haul-out sites and caves or caverns for the animal to rest and reproduce. Even though responsible scuba diving instructors hesitate to make trips to known seal caves, the rumor of a seal sighting quickly becomes a tourist attraction for many. Irresponsible scuba diving trips scare the seals away from caves which could become habitation for the species. The Environment and Urbanization Minister of Turkey announced on 18 November 2019 that a plan was proposed to further preserve the species to allow the sub species of Foça, Gökova, Datça and Bozburun to increase in numbers. Under the auspices of the Convention on Migratory Species of Wild Animals (CMS), also known as the Bonn Convention, the Memorandum of Understanding (MoU) concerning Conservation Measures for the Eastern Atlantic Populations of the Mediterranean Monk Seal was concluded and came into effect on 18 October 2007. The MoU covers four range States (Mauritania, Morocco, Portugal and Spain), all of which have signed, and aims at providing a legal and institutional framework for the implementation of the Action Plan for the Recovery of the Mediterranean Monk Seal in the Eastern Atlantic. As there are indications of small population increases in the subpopulations, in 2023 the Mediterranean monk seal's IU…

The Mediterranean monk seal occasionally appears in Classical mythology. In Homer's The Odyssey, the sea god Proteus is shown herding monk seals for Poseidon. The mythical hero Phocus of Aegina (with phokos literally translating to seal in Greek) was the son of the nereid Psamathe, and was conceived while she was transformed into a seal. The ancient city of Phocis (and possibly Phocaea) was named after Phocus, and the city of Phocaea took on the monk seal as an emblem. This has been thought to either be due to the myth of Phocus' birth, or monk seals formerly inhabiting the area where Phocaea was established. There is only a single known surviving depiction of the monk seal from antiquity, this being on a Caeretan hydria likely created by Phocaean refugees in Etruria. Despite its mythological connections and association with certain peoples, the monk seal still seems to have generally been reviled and feared by the ancient Greeks and Romans due to its form and smell, as well as its association with the unknown nature of the ocean. Many Greek and Roman metaphors and idioms portrayed the seal in a negative light. This antipathy may have contributed to its long-term decline in numbers by spurring persecution of the species. On the other hand, a 2000-year-old grave with a skeleton of a Mediterranean monk seal was found during archaeological excavations in the port of Rhodes in Greece; and the seal was buried with a ritual that was used for human burials. The skeleton is now exhibited in the Aquarium of Rhodes. In the 11th century BC, the Assyrian king Tiglath-Pileser I was gifted several animals by the Egyptian pharaoh Ramesses XI, including a crocodile and an unknown creature known as the "river-man". These animals were displayed in the menagerie of his son Ashur-bel-kala, and are portrayed on several of Ashur's obelisk fragments. A pair of hind flippers on one partial fragment has been identified with the "river-man", and if so indicate that the "river man" was almost certainly a monk seal. When the 1979 Mediterranean Games were organised in Split, SR Croatia, SFR Yugoslavia the mascot of the event was a Mediterranean monk seal named Adriana.