From April to June, clumps that look like small round chimneys appear on the sands. "This means that the baby soldier crabs have come on land," Liu explains. Because their eggs are bigger, a young river crab can develop entirely within the egg. For crabs in tidal zones, the young must return to the sea to live.
四到六月時，沙地上會出現一個個像小煙囪的泥球，「由此就可以知道海和尚的幼蟲上岸了」，劉烘昌解釋，生活在河川的溪蟹，因為卵較大，整個幼蟲發育過程可在卵中完成。