Octopodidae – Gurita

Family Octopodidae

 Bathypolypus arcticus
Eneteroctopus dofleini, Giant Pacific Octopus
Octopus briareus, Caribbean reef octopus
Octopus insularis
Octopus macropus (jpg)
Octopus mototi
Octopus vulgaris, Common octopus
Octopus rubescens, Red octopus
Octopus salutii
Hapalochlaena lunulata, a Blue ringed octopus

 

Bathypolypus arcticus,  hidup di kedalaman 200-600 di samudera Atlantik. Gurita ini sangat kecil dengan berat dewasa hanya mencapai 45 gram. Lebih kecil dari tangan kita. Gurita yang hidup di laut dalam tidak memiliki tinta, memiliki jumlah telur yang tidak banyak. Gurita betinanya menjaga telurnya selama 400 hari sampai menetas, dan selama itu gurita ini tidak makan dan menghabiskan energi dari tubuh mereka sendiri untuk menjaga telurnya. Dan mereka memiliki hidup yang lebih panjang dari pada gurita yang hidup di perairan dangkal. Rata2 berumur 3 tahun sedangkan gurita di perairan dangkal hanya setahun
Bathypolypus arcticus
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Eneteroctopus dofleini, Giant Pacific Octopus, di temukan di Samudera Pasifik. Yang dewasa di temukan dengan berat 10-15kg, walaupun ada beberapa jenis di temukan dengn berat 272kg dengan lebar 10m. Berumur 3-5 tahun dengan temperatur 10°C. Betina bisa bertelur ratusan bahkan ribuan telur, yang mereka jaga selama 6 bulan hingga mati..

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Octopus briareus, Caribbean reef octopus,  Gurita merupakan hewan nokturnal. Betina bisa bertelur hingga 500 butir selama bulan Januari

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 Octopus insularis

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 Octopus macropus

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Octopus mototi – Kleptopus adalah gurita beracun yang suka bersembunyi di dalam cangkang kerang. Habitat mereka biasanya di pasir vulkanik yang berwarna hitam di kedalaman 12m dan jauh dari terumbu karang. Bisa berubah warna.

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Octopus vulgaris, Common octopus   di temukan di perairan tropis atau semi tropis di kedalaman 200m. Paling sering di tangkap nelayan dan di jadikan kuliner. Berumur 12-18 bulan. Bisa bertelur 100rb – 500rb butir.  Aktif di siang hari dan pintar berkamuflase

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Octopus rubescens – Red octopuses gurita kecil pemakan plankton.

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Octopus salutii Memiliki tentankel yang panjang dan bisa menghasilkan 2rb-4rb telur.

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Hapalochlaena lunulata, a Blue ringed octopus sangat beracun, bertelur 60-100 butir telur dan kecil

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Coconut octopus – veined octopus, Habitat di dasar laut berpasir

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Seekor gurita yang lagi menjaga anaknya

Octopus tetricus Gloomy Octopus

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Sepioloidea lineolata, the Striped pyjama squid

Sepioloidea lineolata

Tridacnidae – Giant Clams

Description

True giants among the clams, some shells of the Tridacnidae family weigh in at 300 pounds and 3 feet in length. This large mollusc represents an evolutionary off-shoot of the cockle family, which has become highly specialized in both its structure and nutrition. The shell remains attached by a large byssus that, contrary to other clams, appears to emerge from a gap on the dorsal side, near the hinge (see picture at lower right). What has actually happened is that the hinge and umbones have migrated 180 degrees to the ventral position with respect to the internal organs. One adductor muscle has disappeared, and the mantle –actually, enlarged fleshy siphons– fills the entire fluted opening of the shell. All live vertically oriented with the hinge side down.

The mantle has brilliantly colored pigment spots that protect against excessive sun. Deeper, inside the blood sinuses, the trydacnas host millions of living symbiotic, microscopic algae, or zooxanthellae (“zoh-ox-anth-a-lee”). Light for photosynthesis is further focussed on the algae by transparent hyaline lenses along the siphon. The lenses are like those of siphonal “eyes” found in cockles. Although the clam is able to make use of filter feeding like other clams, the zooxanthellae photosynthesize large quantities of nutrient compounds. These products are used as food by the clam, and its excretory organs are correspondingly enlarged to handle a large nitrogenous load from algal metabolism. Where tridacna are found, the zooxanthellae play a key role in coral reef formation by providing food for many invertebrate organisms

Classification
Class: Bivalvia
Subclass: Heterodonta
Order: Veneroida
Superfamily: Tridacnacea
Family: Tridacnidae
Major Genera
  • Genus: Hippopus
  • Genus: Tridacna

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Genus: Hippopus

hippopus          porcellanus

Genus: Tridacna

crocea               derasa                  evae                        gigas                    lorenzi

 maxima           elongata               mbalavuana        ningaloo          noae

rosewateri       squamosa           squamosina