Across
- 2. Build of the organism that allows them to be lifted and sink if they stop swimming.
- 4. No swim bladder, but this, to keep the organisms buoyant.
- 7. Large, long top lobe of the tail fin.
- 8. Gill slits with water flow to allow organisms to breathe and take in O2 from under water.
- 11. Conveyor belt of teeth that are never ending, and push out new teeth.
Down
- 1. Electroreceptors, pores that can detect impulses and heartbeats.
- 3. Scaled that go both ways on the skin.
- 5. Cover gils.
- 6. Skeletal system that is lighter, and more flexible than bone.
- 9. Male reproductive organs, that transfer sperm.
- 10. Fins that resemble the wings of a plane to lift when swimming.