Weddellite occurs as authigenic crystals in sea floor mud. Again there are flashbacks of the mermaid with her sailor on the sea floor. They are laid on the bottom of the sea floor. These are important for detecting their prey on the muddy sea floor. Normal tsunamis generated at sea result from movement of the sea floor. Both targets are visible to sonar and resting on the sea floor. Buoyancy reduces the apparent weight of objects that have sunk completely to the sea floor. These are baited and lowered to the sea floor. Most are deposit feeders, collecting detritus from the sea floor. These sediments are composed of iron oxide minerals deposited on the sea floor. Benthic stingrays (those that reside on the sea floor) are ambush hunters. It hurtled back down, embedding itself upright on the sea floor. The continental slope drops down to the deep sea floor. On striking the sea floor, the rotor would lock. Port Talbot sea floor topography ranges from within Swansea Bay.