Sea Worms. The sea worms are a large and varied group of animals belonging to a group called annelida. They are segmented worms, and all bear at least some resemblance to the common earthworm. In the ocean, however, the worms have evolved many different appearances. One of the more interesting varieties is the tube worms. These animals form a hard-shelled tube that provides them protection.
Earthbag building is a low-tech solution to making foundations (or entire buildings) using basic materials and simple tools. Drawing on the age-old technique of rammed earth building, earthbag uses woven sack material to provide a ready-made, leave-in-place formwork for containing rammed earth mixtures.
To sandbag is to lower expectations of a company's or individual's strength in order to produce greater than anticipated results. Sandbagging, in business, is most often seen when company managers temper the expectations of shareholders by giving guidance below what they know will be achieved. The result is that once the better-than-expected results are presented, investors are more impressed than they would have been if the company had merely met expectations.