We're a bunch of snails living in a tank, and this is our blog. This is a side blog, so we can't follow you from here. But if you post a lot of snail pictures, our main blog, thlpp, will follow you.
My boyfriend told me recently that barnacles have like, teeth??? They have tentacle teeth that eat fish & thats why they’re dangerous. What the fuck!?
I wish there were badass fish eating barnacles but no they really only have a little round hole for a mouth, deep inside the shell, and the hairy "tentacles" that pop out are the legs, which catch plankton from the water. A lot of plankton consists of tiny animals so they do end up eating meat of course, in fact some of the most common of all plankton in the sea are barnacle larvae, so they're always idly eating each other's babies.
There is a barnacle that grows as a parasite on small deep sea sharks though. Barnacles on other vertebrates, like whales or turtles, aren't parasitic at all and just riding around. But this one feeds on the shark and even castrates it, which is something many parasites do just so their host doesn't divert too many nutrients into having babies. I think this is the only case on which any parasite does this to something with a spinal cord.
image D here shows a non-parasitic barnacle in the same family for comparison, the parasitic one even lost its normal filter feeding system and draws sustenance through "roots!" Sometimes a crustacean wants to be a tree.
I love this caption in the Wikipedia entry for the ram's horn squid, Spirula, calling this illustration "dated" because the light is pointing up. They do not mean that the light is on the wrong part of the body, the anatomy here is still reasonable. They just mean these squids always swim with their tentacles pointing up and their lights pointing down.
There you go, wiki editor, I fixed it. And now YOU'RE the one upside-down!! Haha!!! NOW WHO'S DATED!!!!
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