Unnamed Hurdia Descendant

"it now roams, and is kind of like salmon, having specific breeding grounds and going to the exact same place of where they were born, and they have teeth, (that look like horns, like narwhals) evolved from the hurdia's horn like head, are used for both defense and mating displays. they are territorial and they make patterns in the sand, reminiscing those of the nests of a certain japanese pufferfish. they camouflage themselves by burying themselves with all but their "horns" sticking out, looking like sea fauna around it. there's a special fish/eel thing that likes to eat on those fauna, so the hurdia descendant took that to their advantage"

-Schwefel Kamm

The (as of now) Unnamed Hurdia Descendant is a large Anomalocaridid species submitted to the project November 1st, 2018. It is the first submission by Schwefel Kamm, and the only creature which has not been named itself. However, Kamm says it's still in the genus Hurdia, so its name is still Hurdia.

Being only a species of a genus, it probably looks quite similar to its far smaller relative. Its description describes a fairly complex sense of memory, and has large "teeth" that act as horns, evolved from Hurdia's helmet-like head piece.

They can bury themselves beneath the ground with the horns sticking out, and there's a creature that eats fauna that these horns resemble, to serve as a lure.

Trivia

 * Its official description is the longest of any description.