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January 19, 2012
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REP: The Beakfish by Ramul REP: The Beakfish by Ramul
The beakfish are a very diverse group of eupinna distributed across the shelf seas worldwide. They are small to middle-sized (max. 60 cm long) animals with very diverse feeding habits they adapted their beaks to. The beaks are the enlarged frontmost median teeth of the vertical jaws; the horizontal jaws are reduced to muscle attachments, acoustic sensors and, in some species, water pumping organs. Beakfish are mostly diurnal and have good color and shape perception. Many species from small schools, but especially the bigger and predatory species are solitary. Like the other teeth the beaks are shed regularly; the new beak grows under the old one, finally pushing it outside. A few species, like the erabanes, have bimodal beaks that are adaptions to sporadic food sources, like era worm mass spawnings. In this case, the trigger to shed the beak to the elongated form is era worm poison in the water the erabanes are immune to. Outside of era worm season, they spend their lives as generalistic omnivores.

Common shelfhog: A member of a mostly herbivorous group that feeds on lithophytes; some species specialize on small hard-shelled animals. An unique feature of this group are the constantly growing beak teeth that are not shed.
Northern pitbullfish: The pitbullfish are a group of small ambush predators. Species with larger beaks use pure force to subdue their prey, while species with smaller, slender beaks utilize venom.
Rockpoker: These animals have an elongated head with foreset jaws that enable them to stick their snouts into narrow crevices while still being able to open their mouths fully; sometimes the beak is reduced and the horizontal jaws are used to suck small prey into the tube-like mouth. The species that feed on endobenthos usually possess electroreceptors to find their prey.
Pronged herring: These filter-feeders use exclusively their tongue for feeding, while the teeth serve as protection for the filter apparatus. As an unique trait, the lateral teeth of the lower jaw are enlarged as well. Similar to selodkas, the pronged herrings form large swarms.
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:iconroflo-felorez:
RoFlo-Felorez Featured By Owner Jun 4, 2012  Hobbyist Digital Artist
maybe the fishlike common ancestors of the ikran and the leonopteryx in Avatar resembled fish like this kind, i like it :icongrin--plz:
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:iconramul:
Ramul Featured By Owner Jun 4, 2012
Possibly, but we never saw any fish in Avatar, so possibly the Ikran ancestors looked more like rays than regular fish.
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:iconroflo-felorez:
RoFlo-Felorez Featured By Owner Jun 4, 2012  Hobbyist Digital Artist
yea possibly, i just remember something mentioned somewhere that the flying creatures of pandora evolved from some sorta fish creatures, and this pic made me think of that :P
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:iconnibiruplanet8:
nibiruplanet8 Featured By Owner Jan 28, 2012
So the Pronged herring is similar to filter feeding whales, and because it doesn't use one pair of jaws either horizontal or vertical more than the other they have stayed at a relativly equal size, correct?
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:iconramul:
Ramul Featured By Owner Jan 28, 2012
Not really, the horizontal jaws got already reduced in it's ancestors, the protruding parts are the lateral teeth of the lower jaw.
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:iconnibiruplanet8:
nibiruplanet8 Featured By Owner Jan 28, 2012
oh, i thought that they were jaws because most of their ancestors or similar species had two sets of jaws
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:iconnibiruplanet8:
nibiruplanet8 Featured By Owner Jan 28, 2012
Also do they move in a fashion similar to whales or dolphins or is it different?
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:iconramul:
Ramul Featured By Owner Jan 28, 2012
Yes, dorsoventral movement, derived from the crawling movement of the common ancestor they share with armor worms.
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:iconnibiruplanet8:
nibiruplanet8 Featured By Owner Jan 28, 2012
Ah I understand now.
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:iconalexsone:
AlexSone Featured By Owner Jan 26, 2012  Hobbyist Digital Artist
I have translated new descriptions!
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