| A | B |
|---|
| swim bladder | used to maintain buoyancy |
| oviparous | lays eggs |
| oviviviparous | eggs are incubated in mother's body |
| viviparous | bears live young |
| gills | remove oxygen from water |
| pyloric ceca | secretes digestive enzymes |
| hagfish | has six hearts and can tie itself in knots |
| jawless fish | most primitive phylum |
| Chondrichthyes | cartilaginous fish, such as rays, skates, and sharks |
| Osteichthyes | bony fish, such as eels and salmon |
| lampreys | jawless fish, usually parasitic as adults |
| "ichthys" | means "fish" |
| lungfishes | gulp down air into a simple lung-like sac |
| lobe-finned fishes | very common type of fish in Devaronian times |
| Fishes | aquatic vertebrates with scales, fins, and pharyngeal gills |
| pectoral fins | paired posterior swimming appendages |
| gill filaments | contain many cappilaries and provide a large surface area. |
| ammonia | fish get rid of nitrogen-containing waste in this form |
| olfactory bulbs | part of the brain that decodes scents |
| lateral lines | used to detect vibrations |
