Barnacle
Barnacles are shellfish that cling to rocks or ships hulls.
Barnacle
Sea creatures that attach themselves to rocks include shellfish such as limpets, mussels, oysters, barnacles.
rocks and sticks
Possibly spears, rocks, and sticks
they use rocks and sticks for hammers
Some examples of clinging shellfish are barnacles, mussels, and limpets. These shellfish attach themselves to rocks, docks, or other hard surfaces using a strong adhesive substance secreted by their bodies.
They suck clams and shellfish from the rocks in shallow waters. They also each fish.
Sea otters are known to feed on shellfish like clams and mussels by using their teeth to crack open the shells. They balance the shellfish on their chest as they float on their backs and use rocks to break open the shells.
Probably building tools out of rocks and sticks.
they use rocks and sticks for hammers
you use sticks and rocks