A giant red leech hunts down a 70cm long blue worm and sucks it down like spaghetti. The biggest of these, the giant red leech had been reported preying on the giant blue earthworm itself.

Medicinal leeches, or Hirudo medicinalis ... “They’ve got this nice cross-stitch pattern of red and yellow going down their back.” Mr Harvey feeds them once a month by filling a dried ...