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Saurida tumbil, commonly known as the Greater Lizardfish, is a demersal marine fish belonging to the family Synodontidae. It is characterized by its elongated, cylindrical body, large mouth, and numerous sharp teeth, indicative of its predatory nature. This species is a significant component of commercial fisheries across its range.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Dorsal surface is typically brownish or grayish, fading to silvery-white on the ventral side. Often exhibits faint, irregular dark blotches or bars along the flanks, which can be more pronounced in some individuals. Fins are generally translucent or dusky.
- Scale type
- cycloid
- Mouth position
- terminal
- Distinctive features
- Elongated, cylindrical body, somewhat compressed posteriorly., Large, broad head with a very large mouth extending well beyond the posterior margin of the eye., Numerous sharp, needle-like teeth, visible even when the mouth is closed., Adipose fin present, small and located posterior to the dorsal fin., Pectoral fins relatively short, not reaching the origin of the dorsal fin., Pelvic fins large, located abdominally, with 8 rays, the inner rays being longer than the outer ones., Lateral line prominent and straight.
- Dorsal fin
- Single dorsal fin with 10-12 soft rays. Adipose fin present.
- Tail fin
- Forked caudal fin.
- Pectoral fin
- Short, with 13-15 rays, not reaching the dorsal fin origin.
- Distinctive fins
- Pelvic fins are large, with 8 rays, and the inner rays are notably longer than the outer rays. This is a key diagnostic feature for the genus Saurida.
Identification Tips
Mouth size and teeth
The mouth is very large, extending well past the eye, and filled with numerous sharp, visible teeth.
Pelvic fin structure
The pelvic fins have 8 rays, with the inner rays being distinctly longer than the outer rays. This is a crucial distinguishing characteristic from other lizardfish genera.
Body shape and coloration
Elongated, cylindrical body with a brownish-gray dorsal side and silvery-white belly, often with faint dark blotches.
Adipose fin
Presence of a small, fleshy adipose fin posterior to the dorsal fin.
Habitat
- Water type
- saltwater
- Depth
- Typically found on sandy or muddy bottoms from shallow coastal waters (10-100 meters) down to depths of approximately 350 meters.
- Environment
- Demersal, inhabiting continental shelves and upper slopes. Prefers soft substrates where it can partially bury itself to ambush prey. Often found in estuaries and nearshore areas as juveniles.
- Geographic range
- Widespread in the Indo-Pacific region, from the Red Sea and East Africa eastward to Japan, Australia, and the South China Sea. Its range extends throughout the Indian Ocean and into the western Pacific.
Aquarium Information
- Care level: expert
- Temperament: aggressive
- Diet: carnivore
- Minimum tank size: 300 gallons
- Temperature: 24-28°C (75-82°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Not suitable for community tanks. Best kept alone or with very large, robust, and equally aggressive species that cannot be swallowed.
- Special requirements: Requires a large tank with ample swimming space and a soft sand substrate for burrowing. Excellent filtration is essential due to its predatory diet. Live or fresh dead fish/shrimp are preferred foods. Not commonly kept in home aquaria due to size, predatory nature, and specialized care.
Wild Information
- Conservation status: least concern
- Seasonality: Spawning typically occurs during warmer months, varying geographically. Available year-round in many fishing grounds, with peak catches often coinciding with post-spawning aggregations.
- Market price: Varies significantly by region and market, generally moderate.
- Commercial importance: high
- Taste: Mild, slightly oily, with a firm texture.
- Texture: Firm, flaky white flesh.
- Cooking methods: Frying, Grilling, Baking, Curries, Dried and salted (Bombay Duck in some contexts)
- Nutritional value: Good source of protein and omega-3 fatty acids.
Key Facts
Ambush Predatorbehavior
Greater Lizardfish are classic ambush predators, often burying themselves in sand or mud with only their eyes exposed, waiting for unsuspecting prey to pass by.
Voracious Appetitebehavior
They are highly carnivorous and will consume almost any fish or invertebrate that fits into their large mouths, playing a significant role in their ecosystem's food web.
Commercial Importanceinteresting
Despite their bony nature, they are a commercially important species, particularly in Asian markets, where they are sold fresh, dried, or processed into fishmeal.
Misnomer 'Bombay Duck'interesting
In some regions, particularly India, dried lizardfish are erroneously referred to as 'Bombay Duck,' a name more accurately applied to the unrelated Harpadon nehereus.
Safety Information
Handle with care- Safety level: caution
- Venomous: No
- Edibility: edible
- Handling notes: Greater Lizardfish possess numerous sharp teeth. Care should be taken when handling to avoid bites. They are not venomous, but a bite can cause a painful laceration. Use gloves or a fish gripper when unhooking.
Similar Species
Shortfin Lizardfish
Saurida micropectoralis
Saurida micropectoralis has shorter pectoral fins that do not reach the origin of the dorsal fin, and typically has fewer pectoral fin rays (11-12) compared to S. tumbil (13-15). The inner pelvic rays are also not as elongated as in S. tumbil.
Slender Lizardfish
Saurida gracilis
Saurida gracilis generally has a more slender body and often exhibits more distinct dark cross-bands or blotches on its flanks. Its pectoral fins are also relatively shorter, and the inner pelvic rays are not as elongated as in S. tumbil.
Largescale Lizardfish
Saurida undosquamis
Saurida undosquamis typically has larger scales (fewer lateral line scales) and often has a more distinct series of dark spots along the lateral line. The inner pelvic rays are also not as elongated as in S. tumbil.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Aulopiformes
- Family
- Synodontidae
- Genus
- Saurida
- Species
- tumbil
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