Common name: Spotted flathead

Scientific name: Cociella crocodilus (Cuvier, 1829)
Crocodile Flathead (Cociella crocodilus) in the Red Sea Egypt close upCrocodile Flathead (Cociella crocodilus) in the Red Sea Egypt close up
Crocodile Flathead (Cociella crocodilus) in the Red Sea Egypt close upCrocodile Flathead (Cociella crocodilus) in the Red Sea Egypt close up

General information

The Crocodile Flathead, scientifically known as Cociella crocodilus, is a unique and fascinating species that adds a touch of the exotic to any marine aquarium. This species is known for its distinctive, flattened head and body, which allows it to blend seamlessly with the sandy or rubble substrates of its natural habitat. The mottled patterns on its body provide excellent camouflage against predators and also make it an intriguing visual addition to the tank.

Details

Recommended minimum tank volume
200 liter (53 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.4
Average size
35 cm (1′2″)
Care level
Moderate to easy Requires hiding spots
Diet
Carnivore Enjoys live and frozen foods
Social
Solo Territorial, best kept alone
Reefsafe
Yes
Aggression
Semi aggresive May be aggressive to small fish
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Scorpionfishes
    Scorpaeniformes
  5. Family
    Flatheads
    Platycephalidae
  6. Genus
    Flathead
    Cociella
  7. Species
    Spotted flathead
    Cociella crocodilus (Cuvier, 1829)
  8. Synonyms
    Cociella crocodila (Tilesius, 1814)
    Cociella crocodile (Cuvier, 1829)
    Cocius crocodila (Tilesius, 1814)
    Inegocia crocodilus (Tilesius, 1814)
    Inegocia guttata (Cuvier, 1829)
    Platycephalus crocodilus Cuvier, 1829
    Platycephalus crocodilus Tilesius, 1814
    Platycephalus guttatus Cuvier, 1829
    Platycephalus inermis Jordan & Evermann, 1902
    Thysanophrys crocodilus (Tilesius, 1812)

Care

Cociella crocodilus requires a tank with a sandy bottom or fine substrate to mimic its natural environment. It is a relatively hardy species but does best in a well-established aquarium with stable water conditions. This species is not overly aggressive but may eat smaller fish or invertebrates, so tank mates should be chosen with care. A varied diet of meaty foods such as shrimp, squid, and suitable fish flesh will keep them healthy and thriving.

Reproduction

In the wild, Crocodile Flatheads are oviparous, with females laying eggs that are then fertilized by the male. In the aquarium setting, breeding is rare, but with optimal conditions and a well-matched pair, it is possible to observe spawning behavior. The eggs are typically adhesive and may be attached to substrate or decor within the tank.

Habitat

Cociella crocodilus is found in the Indo-Pacific region, from the Red Sea and East Africa to Samoa, north to the Ryukyu Islands, and south to Australia. It prefers shallow waters, often found at depths ranging from the intertidal zone to about 100 meters. In the aquarium, replicating a similar depth range with appropriate lighting and water flow is beneficial for their well-being.