> This internet-based ecological study, revealed that this use of artificial shells is a "global phenomenon". "We saw it in two-thirds of all terrestrial hermit

> This internet-based ecological study, revealed that this use of artificial shells is a "global phenomenon". "We saw it in two-thirds of all terrestrial hermit crab species," said Prof Szulkin. "That's what we could identify just by using pictures taken by tourists." That’s going to be biased. Social media users are probably more likely to post about hermit crab with human made shells.