Very large body size
Adults typically weigh between 247 and 1,000 kg (545–2,205 lb).
Ocean Sunfish
Mola mola
A very large, laterally flattened bony fish found in tropical and temperate oceans worldwide.
common mola
Last Updated Mar 9, 2026 · 3 sources
Species Guide
What to know about ocean sunfish
A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.
The ocean sunfish (Mola mola) is one of the largest bony fishes and the type species of the genus Mola. Adults typically weigh between 247 and 1,000 kg (545–2,205 lb). The body is flattened laterally and can resemble a fish head without a tail; when dorsal and ventral fins are extended, the fish can be about as tall as it is long. It is native to tropical and temperate waters around the world. Many aspects of sunfish biology remain poorly understood, including mating and spawning locations, early life stages, movement and migration patterns, population structure and status, diet and trophic ecology, and post-release survival rates.
Population status and structure are poorly understood; sunfish are frequently caught in gillnets, they are consumed as a delicacy in some countries, and the EU bans sale of Molidae products.
Movement and migration patterns are poorly understood and the subject of ongoing research.
At the country level, the clearest linked starting points on this guide currently point to Saudi Arabia for divers looking for ocean sunfish.
Identification
How to identify ocean sunfish
The visual markers divers can use underwater, plus the species most likely to cause confusion.
Key identification markers
Flattened, tailless appearance
Main body is flattened laterally and can resemble a fish head without a tail.
Tall profile when fins extended
When dorsal and ventral fins are extended, sunfish can be as tall as they are long (about 175 cm or 6 ft).
Range and Movement
How ocean sunfish move through the world
The broad range, seasonal movement, or migratory behavior that shapes where divers encounter this species.
Movement and migration patterns are poorly understood and the subject of ongoing research.
Diet
What ocean sunfish tend to eat
Useful feeding context that often explains habitat, movement, and encounter style.
Diet and trophic ecology are reported as poorly understood.
Conservation
What is happening with Ocean Sunfish
Status, pressure, and protection context grounded in cited sources rather than filler.
Population status and structure are poorly understood; sunfish are frequently caught in gillnets, they are consumed as a delicacy in some countries, and the EU bans sale of Molidae products.
Main threats
Bycatch in gillnets
Sunfish are frequently caught in gillnets according to available sources.
Targeted harvest for food
Ocean sunfish are considered a delicacy in parts of the world, including Japan, Korea, and Taiwan.
Protections and controls
European Union sale ban
Regulations in the European Union ban the sale of fish and fishery products derived from the family Molidae.
Responsible Encounters
How to dive with ocean sunfish
Conservation-minded guidance for divers who want the encounter without adding pressure.
Give ocean sunfish space, avoid blocking the animal's path, and follow local site and operator rules for wildlife interactions with saltwater fishes.
Field Notes
Interesting things worth knowing
Useful species context that makes the encounter more meaningful once you are underwater.
Field notes
One of the largest bony fishes
Ocean sunfish are among the largest bony fish in the world.
Taxonomy
It is the type species of the genus Mola and one of five extant species in the family Molidae.
Former misidentification
The ocean sunfish was formerly misidentified as the heaviest bony fish; that distinction belongs to the related Mola alexandrini.
Top Countries
Top countries for ocean sunfish
The strongest country-level starting points currently linked to this species.
Top Dive Spots
Top dive spots for ocean sunfish
Directly linked dive spots where this species already shows up in the planning data.
FAQ
Frequently asked questions
Clear planning and conservation answers written for search visibility and AI retrieval.
Research Sources
Ocean Sunfish information sources
Primary and credible references behind the field-guide and conservation claims on this page.
Sources 3Last Updated
Ocean sunfish · Encyclopedia · Wikipedia
Primary wildlife guide source.
Ocean Sunfish · Encyclopedia · Britannica
Supporting wildlife source.
Mola mola · Taxonomy · WoRMS
Taxonomy reference.
Related Species
More in Saltwater Fishes
Related species guides in the same encounter family.
