Also known as the King Crab, the Horseshoe Crab is not actually a crab at all, as it’s much more closely related to spiders and mites. Horseshoe Crab-type creatures started showing up around 400 million years ago and around 170 million years later, the species evolved to what we still see today.
This weird fish has been classified as an eel, but as it differs from all known eel species in a number of distinct anatomical ways. It was first spotted in March 2010 off the coast of Palau in an underwater cave.
You might think that “living fossils” is a bit of an oxymoron, however you’d be mistaken. To be considered one, the living organism in question must more or less maintain the same anatomy and behavior over millions of years while watching the rise and fall of many other still-evolving species. A fascinating look at the world’s most astounding living fossils:
Somewhere on the cephalopod’s evolutionary journey from snail to octopus sits the Nautilus; which has changed very little in the last 500 million years. At one point, the oceans contained hundreds of different types, but nowadays only six remain, all of which are found along the deep slopes bordering Indo-Pacific coral reefs.
Like the squid and the octopus, the Nautilus has tentacles, but many more of them that lack suckers. It also lacks the complex central nervous system of its advanced family members and has been shown to have a much poorer memory in comparison.
Debuting in 1964, the television show Flipper starred a dolphin of the same name and his human caretakers. Despite appearing only as a single dolphin, Flipper was in fact played by five separate dolphins throughout the course of the show. There was some controversy, though, as one of the dolphins died during the course of production.