Abstract: A sea-surface temperature lowering apparatus effectively lowers the temperature of seawater near a sea surface to allow low-temperature deep seawater pumped to around the sea surface to stay close to the sea surface without sinking immediately. The sea-surface temperature lowering apparatus includes a pump that pumps deep seawater. The pumped deep seawater and surface water are agitated to generate agitated water. The sea-surface temperature lowering apparatus includes a platform including the pump and an agitation device. The deep seawater with a low temperature and the surface water with a high temperature are mixed to generate the agitated water. This lowers the temperature of seawater near the sea surface without the deep seawater sinking immediately.

Abstract: A camera with a low maintenance burden is provided. A camera (1) includes a housing (2) having an opening (21), a lens (3) accommodated in the housing (2) to collect light entering through the opening (21), a shutter (4) that opens and closes the opening (21), and a contact member (5) attached to an inner surface of the shutter (4) to come in contact with the lens (3). The contact member (5) comprises a magnetic material and is attracted to the shutter (4) with a magnetic force from the magnetic material.