Lanarkia were very small fish around 30-45 cm in length that would have been possible prey to
eurypterids. The scales of
Lanarkia spinulosa likely served an anti-
parasite role, similar to modern sharks which form large groups and cruise at slow to medium speeds.
Lanarkia lanceolata preserves scales with a generalized form, similar to modern sharks which swim slowly in open deep-water environments.
Lanarkia horrida has an unusual combination of small and larger pointed scales. They could have served a generalist or anti-predator role, though juvenile
small-spotted catsharks (
Scyliorhinus canicula) use similar scales on their tail to rasp at food. ==References==