• [+] Organisms by location (7 C)

A

• [+] Aquatic organisms (17 C, 9 P)

B

• [+] Biota (9 C, 1 P)

C

• [+] Cave organisms (10 C, 20 P, 2 F)

E

• [+] Eukaryotes (7 C, 27 P)

F

• [+] Famous organisms (2 C)
• [+] Fictional life forms (26 C, 132 P)

H

• [+] Hybrid organisms (2 C, 9 P)

L

• [+] Living fossils (69 P)

M

• [+] Microorganisms (6 C, 5 P)
• [+] Model organisms (5 C, 61 P)

P

• [+] Parasites (5 C, 230 P)
• [+] Pests (2 C, 4 P, 1 F)
• [+] Prokaryotes (2 C, 7 P)

S

• [+] Superorganisms (1 C, 22 P)

V

• [+] Viruses (20 C, 507 P, 1 F)

W

• [+] Wildlife (11 C, 17 P)

Y

• [+] Species by year of formal description (9 C)

β

• [+] Wikipedia:Books on organisms (1 C, 1 P)

• Biota (taxonomy)
• Organism

C

• Copiotrophs

D

• Digital organism

L

• Largest organisms
• List of long-living organisms

N

• Neomura

S

• Smallest organisms