What Is Senescence?

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Listen to me, boy. You will hear about sea slugs. You will enjoy sea slugs

Costasiella kuroshimae / leaf sheep. Discovered off the coast of Japanese island Kuroshima in 1993, they can indirectly perform photosynthesis by absorbing chloroplasts from algae

Cyerce nigricans. The cerata can be easily cast when disturbed. They can also swim by powerfully flapping said cerata when strongly stimulated. I think they look like butterfly wings!

Jorunna parva / sea bunny. They are covered in papillae, which are fleshy protuberances used for sensory functions. It looks like fur!

Glaucus atlanticus / blue glaucus. They are rarely seen, except during periods of on-shore winds which brings them and their prey into coastal waters. They are the most dangerous sea slug to handle, able to give humans a very painful and potentially dangerous sting

Chromodoris lochi / loch's chromodoris. They are spongivores, and prefer being on the underside of overhangs on rocky reefs. Their distribution is widespread in the Indo-Pacific. Everyone I show sea slugs to seems to love this little guy

Dirona albolineata / white-lined dirona. A translucent predator that often eats bryozoans and small snails. They generally reside on rocks and sometimes mud in the intertidal. Pretty little things, they remind me of shards of glass

Phidiana hiltoni / Hilton's Aeolid. They are known for being quite aggressive, often biting and fighting other aeolids, which is so real of them. They always reminded me of lit matches

Acanthodoris lutea / orange-peel doris. Its bright aposamatic colouration is a warning to predators of its distasteful toxicity. They also notably smell of sandalwood! You don't understand. I NEED to hold one

Nembrotha kubaryana / dusky nembrotha. They use the toxins in their prey ascidians to defend themselves against predators. The toxins are stored in their tissues then released in a slimy defensive mucus when alarmed. Nembrotha kubaryana are well-known for their neon appearance

Phyllodesmium poindimiei / Spun Of Light. It's primarily nocturnal and can cast its cerata for protection. Anyway, can we all agree that Spun Of Light is the most awesome name for a sea slug ever? I mean, look at it. That's a sea slug spun of light if I've ever seen one

Conclusion: sea slugs are the creatures ever

A rescued pelican in the backseat.

Byzantine history be like:

In 874 Emperor Kostalogous IV ascended to the throne after blinding sixteen nephews, and married his wife, Theodora.

However, he soon ran afoul of the Patriarch of Constantinople, Theopelagionikus, and his wife Theodora.

In 895 he was deposed by his general, Justiniapelomaxorianous II, and his wife Theodora.

This created nine new church schisms.

@confidently-regretful

(Sorry to be that guy but) the leaf sheep is not actually a nudibranch, but instead part of the closely related order sacoglossa. Nudibranches are carnivorous while sacoglossa are herbivorous and feed by sucking the sap out of microscopic algae. Many sacoglossa perform a process called kleptoplasty, where they reuse chloroplasts from the algal sap they feed on and implement them into their cells. Some notable examples are the bivalve snails in the family juliidae, the eastern emerald elysia (elysia chlorotica) and obviously the sea sheep. Another slug from the order elysia (elysia rufescens) reuses defensive molecules called kahalalides as well as chloroplasts. Most sacoglossans survive primarily through heterotrophic means (ingesting and digesting) and photosynthesise when food is scarce or unavailable as a last resort. Though research has shown leaf sheep can survive long periods of time with little to no food of heterotrophic or homotrophic (photosynthetic) origin. They store their chloroplasts in cerata, which are structures often found on nudibranches and regularly used for gas exchange or- in blue glaucus’ case- for attack and defence. They also have rhinophores protruding from their face, structures also commonly found on nudibranches, which are chemosensory organs (essentially face tongues) that appear ear like on nudibranches and sacoglossans alike.

To conclude: while leaf sheep are very similar to nudibranches, they belong to the sacoglossan family (which is good because sacoglossans are just as cool) and luckily are not the only animals to photosynthesise.

(I’m researching them for a highschool project and am so obsessed haha)

So not technically a fish but I absolutely love these lil fellas

They’re Nudibranch sea slugs and they all look so pretty!!!!!

Some notable exception are the Sea Bunny (left) which is just the most adorable thing I’ve ever seen

And the Leaf Sheep (right), which is the only animal known to be capable of photosynthesis!

i am SUCH a nudibranch fan oh my god. actual underwater fae creatures. beloved little freak animals. i want to eat them like cereal

Beetles 🪲🐞

What makes the dark shyshark (Haploblepharus pictus) so shy? When threatened, this critter might curl up into a ring and cover its eyes with its tail. Scientists think this defensive posture makes it harder for predators to gulp the dark shyshark down for an easy meal. Found in parts of the southeast Atlantic Ocean, this shark can grow to about 22 in (55.8 cm) long. Its diet includes crustaceans, mollusks, and fish.

Photo: Raoulco, CC BY-NC 4.0, iNaturalist

DRAG CRAB DRAG CRAB DRAG CRAB

look at the shape range of crabs. yeti crab vs atlantic mole crab vs japanese spider crab

i am in awe!!!!

my fish delivered a hot new reaction image