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Il grongo - Conger conger
Skip to content Pesce serpentiforme con pinna anale e dorsale unite, il grongo e non gronco come spesso capita di dire vive in Mar Mediterraneo, in Oceano Atlantico ed in Mar Nero.
Di giorno vive nascosto tra le rocce ed anfratti dove si riposa appoggiato sul fondale nascosto dai predatori. La notte esce per andare a caccia di piccoli pesci e polpi di cui é ghiotto . E’ un pesce necrofago e si nutre spesso di pesci già morti.
Popola spesso relitti depositati su fondali sabbiosi ma anche fangosi. Presente generalmente tra i primi metri d’acqua sino ai 400m di profondità anche se sono state segnalate catture a più di 1000m.
Morfologia del grongo Simile all’anguilla ed alla murena , il grongo ha una pelle molto liscia e non sono presenti scaglie. Il muso é lungo e la bocca é grande, munita di due file di denti che servono per tranciare ad esempio i tentacoli dei polpi . Il grongo infatti morde con forza il tentacolo ed roteando su se stesso riesce a staccare il boccone.
Di colore tendenzialmente grigio scuro sul dorso con ventre bianco, il grongo presenta delle piccole macchie bianche allineate lungo la linea laterale.
Gli esemplari più grossi possono pesare sino a 70 Kg ma generalmente i gronghi non superano il metro di lunghezza e pesano meno di 5 Kg.
La pesca del grongo Preda tipica del surfcasting notturno, il grongo si pesca anche con i
palamiti. Prede delle reti da posta i gronghi vengono spesso anche catturati
dalle reti da strascico.
Il grongo non ha gran valore commerciale, ma in realtà (soprattutto gli
esemplari piu grandi) sono ottimi da fare al forno o per la preparazione di
zuppe come ad esempio il caciucco.
La riproduzione del grongo Il grongo si riproduce con l’arrivo dei primi caldi. Sembra che questi pesci si riuniscano in zone ben precise per accoppiarsi. Avviene cosi una migrazione di massa degli esemplari maturi. Una zona é stata individuata in Sardegna, una invece tra lo stretto di Gibilterra e le isole Azzorre. Le larve sviluppano 4 fasi prima di diventare adulto : Prelarva, larva o leptocefalo nastriforme, semilarva ed una forma di transizione con l’adulto.
Nome scientifico : Conger conger
Genere : Conger
Famiglia : Congridae
Sottordine : Congroidei
Ordine : Anguilliformes
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Salve,
Vorrei fare una segnalazione di in esperienza vissuta al largo della costa dell Angola.
Mi trovavo lì per lavoro e con le telecamere dei macchinari vidi un enorme esemplare di grongo che, paragonato a fianco alla grossa struttura sottomarina sarà stato circa tre metri di lunghezza.
Sapevo da alcuni pescatori che avevano visto esemplari molto grandi ma non pensavo arrivassero a queste dimensioni.
La struttura, ed il grongo si trovavano a poco più di 2000 metri di profondità. La struttura era un manifold di collegamento di pozzi petroliferi.
Grazie per scrivere i vostri interessanti articoli
Cordiali saluti