so this little marine critter is the famous siphonophore (NOT A JELLYFISH) Portuguese Man O’ War

such a cute baby alien, This Physalia physalis was stranded at Olivencia beach, Bahia - Brazil, scaring misunderstood people who didnt appreciate her beauty

A Siphonophore  is any of various transparent, often subtly colored marine hydrozoans of the order Siphonophora, consisting of a floating or swimming colony of polyp-like and medusa-like individuals.

Purple jellyfish | ©Frédéric Lechat   (Belle-Île, France)

Pelagia noctiluca (Semaeostomeae - Pelagiidae) is a jellyfish found in the Northeastern Atlantic, Mediterranean, Indian Ocean, and western and central Pacific. Sometimes it is commonly named Mauve stinger.

These jellyfishes are beautiful, especially when they phosphoresce. The Mauve stinger glows by producing luminous mucus from surface cells when it is knocked or disturbed by waves.

Unlike most jellyfish, the life cycle of the mauve stinger does not involve a fixed stage.



The Tentatrio Kickstarter is LIVE! You can now reserve your very own Ika, Jellyblub or Sweetoof plush. 

First day pledges are SUPER important—you won’t be charged until the project ends on June 5th, so if you love it, back it!


If plushies aren’t your thing but you’d still like to support me, reblogs/tweets/FB shares are totes loved. <3



Not much is known about this mysterious species, measuring 50 cm long and has a powerful sting that can be felt in the water surrounding the creature.

The incredibly rare Crambione cookii had not been seen since 1910, but has recently been discovered on the coast of Queensland, Australia, where he was captured.

His sketch has so far been the only record of the living creature and has even been used to help identify the animal by jellyfish expert Lisa-Ann Gershwin, who confirmed the existence of this unusual marine inhabitant after he was captured.


Blue Button (Porpita porpita)

…a species of colonial porpitid hydrozoans which occur in tropical and sub-tropical waters of the Pacific, Atlantic, and Indian Oceans. Although blue buttons look similar to jellyfish they are actually a colony of numerous hydrozoan polyps. Blue buttons are typically seen drifting on the surface of the ocean where it feeds on zooplankton which drift too close. Blue button colonies consist of two main parts: the float which is a hard brown circle which keeps the colony afloat, and the colony which forms the “tentacles” of the organism, these tentacles are laced with nematocysts which are used to dispatch prey.  


Animalia-Cnidaria-Medusozoa-Hydrozoa-Anthomedusae-Porpitidae-Porpita-P. porpita

Images: Bruce Moravchik and Tanay PrabhuDesai

Anthopleura elegantissima, Aggregating Anemone | ©Marlin Harms (North Point, Morro Strand State Beach, Morro Bay, California, US)

This colonial anemone with tentacles greenish to pinkish, can be found on rocky, tide swept shores along the Pacific coast of North America.

An interesting fact of these anemones, recently studied, is that High-intertidal individuals are exposed aerially up to 18 h each day, unlike low-intertidal individuals which may be continuously immersed over many days [read more].

Animalia - Cnidaria - Anthozoa - Hexacorallia - Actiniaria - Actiniidae - Anthopleura - A. elegantissima


Scientific photography by Arthur Anker

1.- Crab megalopa (Carpilius sp ?)

2.- Stilapex montrouzieri (Moorea, French Polynesia)

3.- Euthamneus cf rostratus (Moorea, French Polynesia)

4.- Stauromedusa (French Polynesia)

5.- Pilumnus vespertilio (Madagascar)

6.- Notospermus tricuspidatus (Moorea, French Polynesia)

7.- Diopatra sp

8.- Galeommatid bivalve, possibly Scintilla sp

9.- A thalassematid echiuran (Madang, Papua New Guinea)

10.- Male ovigerous sea spider (Pycnogonida)