lancelets.
Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called lancelets.
<h3>What traits do lancelets possess?</h3>
- Lancelets are sleek creatures.
- A dorsal fin runs the length of the body's upper surface, continuing as a caudal fin around the tail and a ventral fin to the body's bottom surface atrium.
- Paired fins are not present, but metapleural folds on the body's sides may be paired fin progenitors.
<h3>How come it's called a lancelet?</h3>
Because of their elongated bodies, lancelets are also known as amphioxus, which translates to "both ends pointy".
<h3>Where do lancelets live?</h3>
- Lancelets are found on temperate and tropical shores all over the world.
- They live in shallow coastal waters with soft substrates that range from sand to coarse shelly sand or gravel.
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