Caribbean Monk Seal

Neomonachus tropicalis

EXExtinct

The Caribbean monk seal once rested on quiet beaches and fed in warm waters from the Gulf through the Caribbean. Centuries of killing for oil, meat, and collections reduced a naturally approachable seal that bred on exposed shores. Confirmed sightings ended in the twentieth century, and the species is now extinct. Its disappearance shows how quickly repeated pressure can erase a wide-ranging marine mammal.

US Range
Explore by state

Caribbean Monk Seal across 1 state

Occurrence records, conservation status, and the places it turns up, state by state. Open a state for detail, or visit its full page.

  • FloridaNativeOccasional19 records

    State rankPresumed Extirpated

    Countiesrecorded in 10

    Sparse historical record in Florida; the species is extirpated there and the timing of activity was not well documented.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

EX – Extinct

No reasonable doubt that the last individual has died.

Best encounter

Where and when to see a Caribbean Monk Seal

Your best chance: Florida.

Where
FloridaFL

Life history

The Caribbean Monk Seal (170.1–272.2 kg375–600 lb) is a carnivore that carries a 365-day gestation, and bears about 1 young per litter. Maximum recorded longevity is 20 years.

Life cycle

  1. Gestation1 years (≈12 months)
  2. Birthlitter of 1 young
  3. Maximum recorded longevity20 years

Reproduction

Gestation
365days≈12 months
Litter size
1youngaverage
Litters / year
0.89littersabout one every 1.1 years
Max longevity
20years

Diet composition

Carnivore

By foraging composition: 60% fish, 40% invertebrates.

  • Fish60%
  • Invertebrates40%

Most active during the day and at dawn and dusk.

Typical values for the species, not local measurements. Maximum longevity is the longest lifespan on record; most individuals live far less.

Commonly confused with

Animals people sometimes mistake for the caribbean monk seal, and how to tell them apart.

A seal of warm shores

Caribbean monk seals had rounded heads, short muzzles, and brown coats that faded underneath. They hauled out on sandy islands, reefs, and remote beaches. Unlike seals tied to cold seas, they lived entirely within tropical and subtropical waters. Fish and other marine prey supported them around reefs and shallow banks.

Why the species vanished

Sailors and hunters killed the seals for oil and food from the earliest colonial voyages onward. Later collectors also took animals, while fishing and coastal disturbance reduced safety and prey. Their habit of resting openly made colonies easy to find. Small remaining groups couldn’t recover from repeated losses.

Evidence after the last sightings

The last accepted records came from the western Caribbean during the twentieth century. Later searches and unconfirmed reports didn’t produce dependable evidence of survival. Historical specimens and accounts now define the known range, including Florida and the Gulf. Those records describe former presence, not a living population today.

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • PhyloPicCC0 / CC-BY per itemthe to-scale silhouettesAndrew A. Farke (human silhouette, CC-BY 3.0)
  • AnAge (HAGR)CC-BY 3.0longevity, maturity, and gestation figures
  • IUCN Red Listattributed factthe global conservation status
  • Amniote Life-History DatabaseCC0 · public domainreproduction figures
  • EltonTraitsCC0 · public domaindiet and foraging-activity data