| English | Finnish |
| fungal thread | rihmastosäie |
| golden thread-fin bream | viiriahven-laji (Nemipterus virgatus) |
| mycelium thread | rihmastosäie |
| thread-fin breams | viiriahven-suku (Nemipterus) |
| thread-fin breams | viiriahvenet-heimo (Nemipteridae) |
| thread-leaved water-crowfoot | purosätkin (Batrachium trichophyllum van den Bosch, Ranunculus trichophyllus Chaix) |
| thread-sail filefish | rihmaviilakala (Stephanolepis cirrhifer) |