Crabs Trade Shells in the Strangest Way | BBC Earth
Why the open web links it
Hermit crabs engage in a unique and surprising shell-trading behavior to accommodate their growth.
Linked by 37 independent sites, 4 of them widely read in the 2026-10 crawl of the open web, including nps.gov, bu.edu, upworthy.com, discoverwildlife.com, newsblur.com.