Invertebrates of the Sea
My name is Daphne. Recently, I decided to diversify my jellyfish blog and add other invertebrates of the sea (octopus, starfish, sponges, cuttlefish, urchins, etc). You can find all the different types in my TAGS page. This is a queued animal blog. None of the photography is mine, unless stated otherwise. Send your requests to my ask, or just leave a question. Enjoy your stay.
Here is my Personal Blog.
  • montereybayaquarium:

    Can’t stop watching this strolling cephalopod? Don’t be fooled by its delicate movement—the mimic octopus can easily scare off potential predators. In a flash, this master of mimicry changes its color and shape to hover like a lethal lionfish or slither like a poisonous sea snake. 

    Learn more

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  • astronomy-to-zoology:

    Ophiocoma scolopendrina

    …a species of Ophiocomid brittle star which occurs in the waters around the Red Sea, Eastern Africa, and Madagascar. O. scolopendrina are typically present in crevices and under boulders of intertidal reef platforms where they will feed on a the wide variety of small marine invertebrates which are also present there. 

    Classification

    Animalia-Echinodermata-Ophiuroidea-Ophiurida-Chilophiurina-Ophiocomidae-Ophiocoma-O. scolopendrina

    Image: Hectonichus

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  • thesearethethingsoflife:

    Sea cucumbers extract oxygen from water through a pair of “respiratory trees” that branch off the cloaca just inside the anus. Therefore, they “breathe” by drawing water in through the anus and then expelling it. The trees consist of a series of narrow tubules branching from a common duct, and lie on either side of the digestive tract. 
    Some species of coral-reef sea cucumbers within the order Aspidochirotida can defend themselves by expelling their sticky cuvierian tubules (enlargements of the respiratory tree that float freely in the body cavity) to entangle potential predators. When startled, these cucumbers may expel some of them through a tear in the wall of the cloaca in a process known as evisceration. The release of these tubules can also be accompanied by the discharge of a toxic chemical known as holothurin, which has similar properties to soap. This chemical can kill animals in the vicinity and is one more way in which these sedentary animals can defend themselves.

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