蛭

Rhizophora mucronata (species of mangrove)

Hirudo nipponia (species of blood-sucking leech)

land leech (Haemadipsa zeylanica japonica)

black mangrove (Bruguiera gymnorrhiza)

mangrove (of family Rhizophoraceae)

vermiculite

Hirudo nipponia (species of blood-sucking leech)

Whitmania pigra (species of leech)

fascioliasis

grey mangrove (Avicennia marina)

Kandelia obovata (species of mangrove)

sheep liver fluke (Fasciola hepatica)

Helobdella stagnalis (species of leech)

leech

Potamogeton distinctus (species of pondweed)