Scientific Name: Tridacna CroceaCommon Name: Crocea ClamTaxonomic ClassificationPhylum: MolluscaClass: BivalviaSubclass: HeterodontaOrder: VeneroidaFamily: TridacnidaeGenus: TridacnaSpecies: CroceaDescription: Tridacna Crocea is a large bivalve mollusk that has a triangular shell with robust and convoluted valves with ribs, where the cloak is hooked when it is extroflexed. At the center of the cloak is the small but elongated blowing siphon and the suction siphon. On the cloak are also the iridophores that regulate the amount of light to be transferred to Zooxantelle. Below the shell there is an opening where the foot is laid, which is used to anchored to rocky substrates (The foot is the only weak spot found in the tridacne, so that’s why is it always advisable to insert a piece of rock).Coloring: The color variation is very varied due to the presence of Zooxantelle in their cloak, in fact there are lots of specimens with different coloring, graining and nuances.Aggression: Not aggressive with any kind of animal but defends by closing its cloak between the big valves, sometimes crushing the predator’s muzzle.
Habitat: Lagoon and reef areas with not excessively clean water.
Temperature: 24-28°CpH: 8.0-8.5Water hardness: 8-10°dH Density: 1.022-1.025Tips for breeding: It is advisable to have a long and adequate acclimatization (eg. drop by drop) to avoid stress and rapid changes in salinity. Particular attention to breed this wonderful animals is given to the natural predators of Tridacne such as Worms of the genus Hermodice Carnuculata and the snails of the Pyramidellidae family. Fortunately, there are fish that eat these parasites: they are small labyrinths of genus Pseudocheilinus (P. hexataenia, P. tetrataenia) and the genus Halicoeres. T. Crocea can be threatened by fish such as triggerfish, angel fish, butterfly fish and large wrasses, crabs, big pagurus taking advantage of tridacne not yet fixed to the substrate, predatory sea stars and large shrimp (such as Saron spp .). Even Acanthuridae, Blennioidei and small Angel Fishes (Centropyge) can cause problems by pinching the cloak continuously that will eventually lead to the death of the animal. In the case of debilitating Tridacne it is advisable to read Saving Clam Using The Glucose Method to try to save these splendid mollusks.Feed: Fitoplancton, Zooplancton , Reef Snow, DOM (Organic Dissociated Substance), and food particles that the animals can filter.
Lighting: Strong Position in the tank: Average or on the tank bottom.
Diffusion: Indian Ocean and Pacific, Red Sea, Vietnam and MalaysiaWater flow: Average / StrongResistance: Delicate, suffers from saline variations.Difficulty: Medium / Difficult – Not recommended for neophytes.
Reproduction: At the end of sexual maturity they release sperm and egg cells simultaneously because they are simultaneous hermaphrodites. Usually the semen is released for first and then the egg cells, in order to avoid the self-fertilization mechanism. Fertilization occurs in free waters like all the juvenile stages.
Extinction risk: Inserted into the red list of I.U.C.N. and protected by C.I.T.E.S.
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