Perhaps, says Hayward, bryozoan larvae feed on algae that grow on the underside of sea ice; then they might accidentally surface when the ice breaks up in summer, before sinking to the bottom for good. (discovermagazine.com)
The researchers used an autonomous underwater vehicle (AUV) named SeaBED that is armed with upward - looking sonar to map the underside of the sea ice floes. (sciencemag.org)
Your story on laying fibre - optic cables in the Arctic (17 March, p 19) stated «the underside of sea ice also... (newscientist.com)