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Gymnammodytes cicerelus, commonly known as the Mediterranean Sand Eel or Smooth Sand Eel, is a small, elongated, and slender fish belonging to the family Ammodytidae. It is characterized by its eel-like body, pointed snout, and the absence of pelvic fins. These fish are well-adapted to sandy environments, where they spend a significant portion of their lives buried, emerging to feed on zooplankton. They play a crucial role in marine food webs as a forage fish for various predators.
Caratteristiche fisiche
- Forma del corpo
- eel-like
- Colorazione
- Dorsal side is typically greenish-brown to olive, fading to silvery-white on the flanks and ventral side. Often iridescent. No distinct markings or patterns.
- Tipo di squame
- cycloid
- Posizione della bocca
- superior
- Caratteristiche distintive
- Extremely elongated and slender body, almost cylindrical., Pointed, conical snout with a protruding lower jaw., Absence of pelvic fins., Lateral line runs high along the body., Small, deeply embedded scales, giving a smooth appearance.
- Pinna dorsale
- Long and low, originating behind the pectoral fins and extending almost to the caudal fin. Composed of 54-60 soft rays.
- Pinna caudale
- Small and forked.
- Pinna pettorale
- Small, located low on the body.
- Pinne distintive
- Pelvic fins are entirely absent. Anal fin is also long and low, originating further back than the dorsal fin, with 29-33 soft rays.
Consigli per l'identificazione
Body Shape
Look for an extremely slender, elongated, and cylindrical body, distinctly eel-like but with fins.
Snout and Jaw
Observe the pointed, conical snout and the prominent, protruding lower jaw, which is characteristic of sand eels.
Absence of Pelvic Fins
A key diagnostic feature is the complete lack of pelvic fins, distinguishing it from many other elongated fish.
Coloration
Note the greenish-brown to olive dorsal coloration fading to silvery-white on the sides and belly.
Burrowing Behavior
In its natural habitat, its rapid burrowing into sand when disturbed is a strong indicator.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow coastal waters, from the surf zone down to about 100 meters, though most common in less than 50 meters.
- Ambiente
- Prefers sandy or fine gravel bottoms where it can burrow rapidly. Often found in bays, estuaries, and open coastal areas with suitable substrate.
- Areale geografico
- Eastern Atlantic Ocean, from Portugal south to Morocco, including the Canary Islands. Widespread throughout the Mediterranean Sea and the Black Sea.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: peaceful
- Dieta: carnivore
- Dimensione minima della vasca: 200 gallons
- Temperatura: 15-22°C (59-72°F)
- Livello di pH: 8.1-8.4
- Durezza: 8-12 dKH
- Compatibilità: Best kept in species-specific tanks or with very small, peaceful, non-predatory fish that do not disturb their burrowing behavior. Avoid aggressive or large tank mates.
- Requisiti speciali: Requires a deep substrate of fine, soft sand (at least 15-20 cm) for burrowing. Excellent water quality and strong water flow mimicking natural currents are essential. Live zooplankton or very small, high-quality frozen foods are necessary for feeding. Not typically kept in home aquaria due to specialized needs.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: More active and accessible during warmer months (spring to autumn) when they emerge from the sand to feed. Spawning typically occurs in late autumn to winter.
- Prezzo di mercato: Low to moderate, primarily used as bait or for local consumption in some regions.
- Importanza commerciale: low
- Sapore: Mild, delicate, slightly sweet.
- Consistenza: Soft, tender, flaky.
- Metodi di cottura: Fried, Grilled, Marinated, Used in soups or stews
- Valore nutrizionale: Good source of protein and omega-3 fatty acids.
Fatti chiave
Burrowing Mastersbehavior
Gymnammodytes cicerelus can bury itself in sand within seconds, using its pointed snout and rapid body undulations, a crucial defense mechanism against predators.
Forage Fishinteresting
These sand eels are a vital food source for a wide array of marine predators, including seabirds, larger fish (like tuna and cod), seals, and dolphins, making them a critical link in the marine food web.
No Pelvic Finsamazing
Unlike many fish, Gymnammodytes cicerelus completely lacks pelvic fins, a distinctive morphological feature that aids in its streamlined, burrowing lifestyle.
No Swim Bladderevolution
Sand eels, including G. cicerelus, lack a swim bladder, which is unusual for most bony fish. This adaptation allows them to rapidly change depth and burrow into the substrate without buoyancy issues.
Nocturnal Burrowingbehavior
While they emerge to feed during the day, sand eels often burrow into the sand at night or during periods of strong currents or danger, remaining hidden until conditions are favorable.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions are required. They are harmless to humans. Handle gently if caught to minimize stress.
Specie simili
Greater Sand Eel
Hyperoplus lanceolatus
Gymnammodytes cicerelus is generally smaller (up to 17 cm vs. up to 30 cm for H. lanceolatus), has a more pointed snout, and lacks the black spot on the snout and the two separate dorsal fins of H. lanceolatus. G. cicerelus also has a more pronouncedly protruding lower jaw.
Lesser Sand Eel
Ammodytes tobianus
Ammodytes tobianus typically has a less pointed snout and a less protruding lower jaw. It also has a small, distinct black spot at the base of the pectoral fin, which is absent in Gymnammodytes cicerelus. G. cicerelus generally has a smoother appearance due to smaller, more embedded scales.
Northern Sand Eel
Ammodytes marinus
Ammodytes marinus is found in more northern waters and has a less pointed snout and a less protruding lower jaw compared to G. cicerelus. Differentiation often requires careful examination of fin ray counts and specific morphological ratios.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Perciformes
- Famiglia
- Ammodytidae
- Genere
- Gymnammodytes
- Specie
- cicerelus
Esplora Mediterranean Sand Eel
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