Blunt Stodée

Back on Earth, the seeming similarity between sharks and the bony fish known as strugeons was purely superficial and the result of convergent evolution. 

Semantics aside, because Eryobis has a small dozen of different fish groups that are referred to as "sharks" by explorers, the Eryobian equivalent of sturgeons do belong to these "shark" like groups. In fact, it has recently been revealed that the highly derived coelacants often called coeaaien, belong to one of two differernt groups that split long ago before either evolved to look similar to sharks. These groups became the Odontocoeiida, the "toothed coeaaien", and the Lamidocoeiida, the "plated coeaaien". Curiously, the apparent sturgeon equivalents of Eryobis were also part of this split and now it seems that most of the armoured ones belong to the Odontocoeiida while the less armoured or armourless ones belong to the Lamidocoeiida.

Common names are always quite variable and can differ per region, yet many of the armourless sturgeon like Laminocoeiidans are reffered to as surgées by human explorers. It is likely that this word came directly from the word for sturgeon from one of the imperium's colonies, given the similarity of the words. But curiously, it was the last part of the name that somehow became a standard suffix for Eryobian sturgeon like fish, which led to common names such as the word used for certain kinds of armoured sturgeon like bunnyfish, "stodée".

Stodées, such as the blunt stodée (Humeracanthus breviceps), are rather easy to recognise by their high set pectoral fins which no longer sport any fin rays at all, rather having been turned into a single large defensive spine on each side. Additionally, they have a row of spine like scales running down their backs that culminate in a very large spine at the base of the first dorsal fin. Despite sharing these defensive spines with many Laminocoeiidans, the stodées seem to have evolved them independently, because unlike surgées and kin, stodées possess true teeth and are thus considered Odontocoeiidans.

The blunt stodée can be found in equatorial rivers and lakes in western Bloëca. These fish are on the smaller side as far as stodées are concerned, typically maxxing out around 1.5 to 1.8 meters long. 

Their diet mostly consists of small mollusks and worms, but they have been observed also including various water plants in it. According to reports of both explorers and native Eryobians, these fish taste like mud and require a lot of seasoning to be palpable. This bad taste is likely caused by their freshwater habitat and benthic diet.

Ægiric Ubondo

Some people in the imperium have referred to Eryobis as "a fisherman's paradise". Compared to Earth and the countless colonies of the imperium, Eryobis has a particularly high amount of very large marine creatures that make for great sport fishing. The kicker is, the local goverment of the AnVela Koeliv system encourages sport fishers to come to Eryobis to help document the incredible diversity of marine life that this world possesses. 

A very large portion of the marine biologists currently deployed on Eryobis are indeed just fishermen who take their job seriously.

 As such, a lot of newly found marine creatures also get their names from the fishermen that catch them. While they often call in actual biologists for the binominal names, they tend to give their fish common names with sometimes unclear origins, sometimes derived from their own languages, sometimes from what the native Eryobians call them or something else entirely.

In the case of the Ægiric ubondo (Ubondo aegiricus),  it was named not for any of the above mentioned reasons, but was rather named by the fisherman that first caught it, Agner Ubondo, and named it after himself. At first they called it "Ubondo's fish", but it quickly changed to just "ubondo"  for simplicity's sake.

The Ægiric ubondo grows to around 1.5 meters in length and is a powerfully built pelagic fish with a very large tail fin. While it may not immediately look like one, the ubondo is in fact a kind of bunnyfish, as can be determined by the placement of its pectoral- and pelvic fins. But while a lot of bunnyfish have evolved somewhat shark-like features, the ubondo has evolved to look more like a tuna, with a torpedo shaped body and small front fins. DNA analysis has shown that ubondos are most closely related to the deep sea fish known as gladdos and together they seem to form their own branch at the base of the Odontocoeiida.

Ubondos usually swim between 0 and 70 meters below the surface where they feed on other and typically smaller pelagic fish, as well as llamplelgans and pectinauts.

While most of their teeth are rather small and concealed by their lips, they possess 4 large fangs at the tips of their jaws that are probably used in prey capture, but might also be used for interspecific combat during mating season.

Red-eye Prosse

Toeing the line between camouflage and extravagant display, the red-eye prosse (Ithopoius coccineus) is a curious little bunnyfish that inhabits seaweed forests off coastal Lachoba. The most striking feature of prosses are their enormous pectoral- and pelvic fins that are normally held against the body, but can be folded out for display. These four large fins have colorations and markings resembling large, red eyes.

These fins are used for both attracting mates and to intimidate competitors and predators. As typically solitary animals, prosses carve out little territories for themselves and do not seem to tolerate other prosses of the same sexe within their territory, but these territories do often overlap with those of the opposite sexe.

Red-eye prosses feed mostly on small invertebrates like various annelids, small arthropods and pectinauts. One thing that has been observed by scuba divers is that prosses will approach divers within their territory and search them for parasites, which might indicate that they act as cleaners for larger animals when they stop by.

Despite possessing no teeth, genetic testing has revealed that prosses are most closely related to the Odontocoeiida, the toothed coeaaien, more than any other bunnyfish. This further reinforces that the shark like body shape of various coeaaien evolved independently.

Blue Surgée

Back on Earth, the seeming similarity between sharks and the bony fish known as strugeons was purely superficial and the result of convergent evolution. 

Semantics aside, because Eryobis has a small dozen of different fish groups that are referred to as "sharks" by explorers, the Eryobian equivalent of sturgeons do belong to these "shark" like groups. In fact, it has recently been revealed that the highly derived coelacants often called coeaaien, belong to one of two differernt groups that split long ago before either evolved to look similar to sharks. These groups became the Odontocoeiida, the "toothed coeaaien", and the Lamidocoeiida, the "plated coeaaien". Curiously, the apparent sturgeon equivalents of Eryobis were also part of this split and now it seems that most of the armoured ones belong to the Odontocoeiida while the less armoured or armourless ones belong to the Lamidocoeiida.

One of the most common sturgeon equivalents along the northern Riatic coasts of Guralta and the southern coasts of Tlèëa is the blue surgée (Riatelops caerulus), a 3 to 4 meter long armourless sturgeon equivalent Lamidocoeiidan, specifically of the family Eryosturiidae.

A medium sized surgée, the blue surgée typically stays close to the seafloor and is often found relatively close to the shore. Unlike many other surgées, this species does not seem to venture into freshwater, instead spending its entire life in the sea.

They have downturned mouths at the end of their rather elongated heads and weak jaws that instead of teeth, possess large plates used to crush hard shelled organisms. Indeed, most their diet consists of various benthic mollusks and crustaceans, though small demersal fish are also ingested on occasion.

Despite surgées often being called armourless, they are not exactly defenseless. Their large size makes sure that they are not frequently preyed upon by predatory fish and they possess a long, extremely sharp spine on at the base of their first dorsal fin which, although no evidence has been presented as of yet, its rumoured to be venomous.