← JournalTwilight Naturalist

Shelfclinger Crab

Petralatus marginis

Twilight6 cm carapace · Clinging · sidling

Field record

It works the underside of the rock shelf in a strict sideways shuffle, and in all the hours I've logged it has never once released every claw at the same time. One anchor point stays fixed while the others test the next hold, a slow negotiation with a ledge that could easily hold all six legs at once.

Marginal note: “never lets go of the ledge with more than one claw at a time”

Habitat

ZoneTwilight Zone

Depth range600–1,300 m

DiscoveryNo special condition — found simply by piloting close enough to identify it.

Catching it

A Twilight-tier catch needs at least a Fine Mesh Net— anything under that rating can never hold it, whatever the throw. Bought at the Quartermaster’s counter for 90 crystals. A held net inks this entry for good and pays its ledger bonus on the spot.

Ledger bonus on capture+6 Accel

Full capture mechanics — sighting vs. capture, the aim ring, why a net below a creature’s tier always bursts — in The Ledger.