Ribbon eels have vastly different colourations based on their age and biological gender! Young individuals are jet black with a yellow dorsal fin, adult males are bright blue with yellow accents (pictured above) and adult females are pure yellow! It’s suspected that these eels also change their sex from male to female, which means that an eel could go through all three colourations!
Below is a young individual and a female individual!
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FISH
FACTS!!!!
Wowza! Took a while, since last year I took some breaks… but I did it! 1000 fish facts just keeps getting closer, eh? It should be here in the later months of this year…. but! An elephant only gets eaten piece by piece! Let’s get to 800 first! ;)
Besides its ability to give electric shocks, another trick up the sleeve of the whitemargin stargazer is two venomous spines just above its pectoral fins! They’ll use their venom to defend themselves against predators, and to subdue prey.
A YEAR OF FISH FACTS!
I shall dedicate this one to my very favourite fish, my true love:
Their current native range is the east coast of North America, but they were also endemic to the Baltic Sea before they went extinct in the 20th century. There have been attempts to replant it though! It’s a fish that enjoys living alone or in small groups and they migrate up rivers to spawn.
Wowza! The milestones just keep coming! Let’s get to 700, friends! ;)
As for your fact….
It is a nocturnal shark, spending its days resting in a comfortable crevice or hidden in vegetation! Like crocodiles, they prefer to incapacitate their prey via a “death roll”, doing a spinning motion and pulling their prey along with them.
Post dividers were made by @rpinkling!! They are very cool and good! :D
A lot of people feel uncomfortable with the idea of fish having teeth, especially when they “shouldn’t”. So, to get you folks more used to the idea, this week, I’m going to be talking about all things teeth, teeth, teeth! That is, a small glimpse into the diversity of fish dentition and the variety of reasons why certain fish have evolved the teeth they have. Thank you @trickstertox for the fun idea :D
This fish is a heterodont, which means its teeth show differences in size and shape: sheepsheads have teeth that have specialised into molars, incisors and grinders. The molars are actually found in several rows, with three rows of molars on the upper jaw and two rows of molars on the lower jaw! The sheepsheads require this specialised and heavily-armed dentition to scrape rooted mollusks and crustaceans off hard surfaces, and to crush their hard shells. Their prey includes animals like clams, oysters, crabs and barnacles, but they also supplement their diet with aquatic plants too.
They have barrel-shaped tubular eyes, which are enclosed inside their head under a layer of transparent soft tissue! They use their peculiar eyes to look for prey that might be floating directly above them; they live deep underwater just at the edge of where light penetration ends, but thanks to their eyes with a large number of rods (a type of photoreceptor) they can see very well into the waters above.
It uses its long caudal fin as a whip to stun fish! It’s a very fast swimmer, known to sometimes leap from the water.
They take part in diurnal vertical migration, which means they dive to deeper water (300 to 500 meters deep) in the morning and ascend back to shallower water in the evening. They do this to follow their prey, which also migrates vertically; bigeye tunas’ migration is linked to the deep scattering layer, a layer of different marine animals!
Their name comes from their tendency to rest completely still on their elongated fins, giving them the appearance of a tripod! When they’re still, their fins appear stiff, but interestingly, when the fish are actually swimming they seem flexible; this had lead to some theories that the fish may pump their fins full of fluids to make them stiff but they’re otherwise quite bendy.
Wahoo has the ability to move both of its jaws! This is unusual for most fish. Their diet is mostly made up of other fish and squid, and they are fast hunters!
Sturgeon are relatively peaceful, bottom-feeding fish! Despite this, they can grow extremely large and live very long; the biggest sturgeon ever caught was a beluga sturgeon that was 7.2 meters long (23'7’’) and weighed 1 571 kg (3 463 lbs)!
