A small subgroup has been observed breaking sponges off the seabed and wearing them on their snouts, apparently to probe the seafloor for fish hiding there.
All fishes stayed on seafloor and nobody avoided to somewhere.
In an effort to figure out what ocean life was like before the modern era, marine scientists have, in the past few decades, cored through seafloor sediments, measured the size of fish bones tossed out at ancient banquets, and combed through the logs of early explorers.
Researchers proposed other resource investigations method for kichiji rockfish such as method using deep-sea monitoring system [[3],[4]] and method using manned submersible vessel [[5],[6]], because the fish usually stay on seafloor without moving and have a high visibility in the photograph.
He believed trawlers that dragged nets along the ocean bottom, scooping up vast amounts of cod, were capturing too many fish and damaging the seafloor.
But Professor Delaney says the Juan de Fuca plate is well-suited for the program precisely because it is self-contained, just offshore and rich with seafloor activity, complicated current patterns and abundant fish and marine mammals.
Sea lions appear to hunt sunfish for sport, tearing the fins off, tossing the body around, and then simply abandoning the still-living but helpless fish to die on the seafloor.
"Most of the Antarctic fish species are associated with the seafloor, and some of the seals feed on bottom fish," Richter said.
It is suggested that the TTSS should be used for the study and modelling of the effects of otter trawling and similar fishing processes on nutrient supply from seafloor sediments and the resulting ecosystem responses.
"How much seafloor disturbance can you do before you interfere with fish-spawning habitats?" He also pointed out that some of the best underwater sand-mining sites are already supplying beaches with sand, under natural processes.
