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Atherina boyeri, commonly known as the Sand Smelt or Latterino, is a small, schooling fish belonging to the family Atherinidae. It is characterized by its slender, elongated body and silvery coloration. This species is highly adaptable, thriving in a variety of aquatic environments, from marine coastal waters to brackish lagoons and even freshwater systems. It plays a significant ecological role as a forage fish for larger predators and is also of some commercial importance in local fisheries.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Silvery body with a distinct, iridescent silver lateral stripe running from the operculum to the caudal fin base. The dorsal surface is typically greenish-grey to olive, fading to white on the ventral side. Fins are generally translucent.
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Two widely separated dorsal fins, the first with 6-10 flexible spines and the second with 1 spine and 8-16 soft rays., Anal fin with 1 spine and 10-19 soft rays., Large, cycloid scales., Relatively large eyes., Small, terminal mouth.
- Pinna dorsale
- Two separate dorsal fins; the first is spiny, the second is soft-rayed. First dorsal fin originates behind the pectoral fin base.
- Pinna caudale
- Forked caudal fin.
- Pinna pettorale
- Short and somewhat pointed, located high on the body.
- Pinne distintive
- The widely separated nature of the two dorsal fins is a key characteristic of the Atherinidae family.
Consigli per l'identificazione
Body Shape and Coloration
Look for a slender, elongated, silvery body with a prominent silver lateral stripe. The dorsal side is darker, often greenish-grey.
Dorsal Fins
Observe the two distinctly separate dorsal fins. The first is spiny and originates behind the pectoral fin base, while the second is soft-rayed.
Scale Size
Atherina boyeri has relatively large cycloid scales compared to some other atherinids.
Mouth Position
The mouth is small and terminal, pointing forward.
Fin Ray Counts
For precise identification, count the fin rays: First dorsal fin (6-10 spines), Second dorsal fin (1 spine, 8-16 soft rays), Anal fin (1 spine, 10-19 soft rays).
Habitat
- Tipo di acqua
- brackish
- Profondità
- Typically found in shallow waters, from the surface down to about 20 meters (65 feet), though occasionally deeper.
- Ambiente
- Coastal marine waters, estuaries, lagoons, river mouths, and even freshwater lakes and rivers. Prefers areas with sandy or muddy bottoms, often near seagrass beds or other vegetation. Highly euryhaline, tolerating a wide range of salinities.
- Areale geografico
- Widespread in the Mediterranean Sea, Black Sea, and adjacent Atlantic coasts from Portugal to Mauritania, including the Canary Islands. Also found in the Caspian Sea and Aral Sea basins, indicating its adaptability to landlocked freshwater systems.
Informazioni sull'acquario
- Livello di cura: intermediate
- Temperamento: peaceful
- Dieta: carnivore
- Dimensione minima della vasca: 75 gallons
- Temperatura: 15-25°C (59-77°F)
- Livello di pH: 7.0-8.5
- Durezza: 10-30 dGH
- Compatibilità: Best kept in species-specific tanks or with other peaceful, similarly sized brackish or marine fish. Avoid aggressive or very large tank mates.
- Requisiti speciali: Requires a well-filtered tank with good water circulation. A schooling species, so a group of at least 6-10 individuals is recommended. Can be sensitive to sudden changes in water parameters. A varied diet of small live or frozen invertebrates is crucial.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawns primarily from spring to late summer, with peak activity in warmer months. Can be caught year-round, but more abundant during spawning season.
- Prezzo di mercato: Varies regionally, generally low to moderate.
- Importanza commerciale: medium
- Sapore: Mild, delicate, slightly sweet.
- Consistenza: Soft, flaky.
- Metodi di cottura: Fried, Grilled, Baked, Marinated
- Valore nutrizionale: Good source of protein and omega-3 fatty acids.
Fatti chiave
Euryhaline Championbehavior
Atherina boyeri is remarkably euryhaline, meaning it can tolerate a wide range of salinities, from full marine conditions to brackish estuaries and even completely freshwater lakes. This adaptability contributes to its wide distribution.
Forage Fish Extraordinaireinteresting
This species forms large schools and serves as a crucial food source for numerous predatory fish, seabirds, and marine mammals, playing a vital role in coastal food webs.
Rapid Life Cyclebehavior
Atherina boyeri has a relatively short lifespan, typically 1-3 years, and reaches sexual maturity quickly, allowing for rapid population turnover and resilience.
Taxonomic Complexityevolution
The taxonomy of Atherina boyeri and its close relatives has historically been complex, with several subspecies and closely related species often confused or synonymized, requiring genetic studies for clear differentiation.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions are required. They are small, harmless fish. Handle gently if caught for release or observation to minimize stress.
Specie simili
Common Sand Smelt
Atherina presbyter
Atherina presbyter generally has smaller scales (55-65 in lateral series vs. 45-55 for A. boyeri), a more pointed snout, and typically inhabits more open marine waters, though their ranges overlap. A. presbyter also tends to be larger.
Small-mouthed Sand Smelt
Atherina mochon
Atherina mochon (often considered a synonym or subspecies of A. boyeri by some authors, but distinct in others) is very similar. Distinctions are often subtle, involving scale counts and genetic analysis. Historically, A. mochon was used for populations in the Black Sea and Caspian Sea, now largely subsumed under A. boyeri.
Mediterranean Silverside
Atherina hepsetus
Atherina hepsetus has a more elongated and compressed body, a longer snout, and a more anterior origin of the first dorsal fin (often above or slightly behind the pectoral fin base). It also tends to have a more pronounced silver stripe.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Atheriniformes
- Famiglia
- Atherinidae
- Genere
- Atherina
- Specie
- Atherina boyeri
Esplora Sand Smelt
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