蛭 - leech

vermiculite

sheep liver fluke (Fasciola hepatica)

Kandelia obovata (species of mangrove)

leech

mangrove (of family Rhizophoraceae)

black mangrove (Bruguiera gymnorrhiza)

Whitmania pigra (species of leech)

land leech (Haemadipsa zeylanica japonica)

Helobdella stagnalis (species of leech)

Potamogeton distinctus (species of pondweed)

Hirudo nipponia (species of blood-sucking leech)

Hirudo nipponia (species of blood-sucking leech)