FIGURE 1.

Characteristics of the Bering Sea burrows. (a) Example burrow with eight openings, entrance positioned at bottom; laser points are 40 cm, scale bar 10 cm. (b) Frequency of observation of burrows of different numbers of openings. (c) Drawing of a typical burrow indicating the mean and standard deviation of main dimensions for entrance opening, intermediate openings, and last opening, total length of the series from entrance to last opening, and terminal radius of the mound of excavated sediment (all measurements in cm). Dashed lines indicate inferred horizontal shaft and potential space continued beyond the last opening. (d) Schematic interpretation of cross‐section for the burrow seen in (c). Scale bar refers to (c) and (d).