| No. | Item | Definition |
|---|---|---|
| 1. | anchor | device securing a boat |
| 2. | anemone | tentacled marine invertebrate |
| 3. | angelfish | brightly colored reef fish |
| 4. | anti-fog | substance preventing lens fog |
| 5. | ascend | move upward in water |
| 6. | barracuda | long predatory silver fish |
| 7. | bay | broad coastal inlet |
| 8. | beach | sandy edge of the sea |
| 9. | blade | flat fin section |
| 10. | boat | watercraft used for access |
| 11. | booties | soft footwear for water |
| 12. | breathe | take air into the lungs |
| 13. | buckle | fastener for adjusting straps |
| 14. | buoyancy | ability to float in water |
| 15. | butterflyfish | thin colorful reef fish |
| 16. | camouflage | blending in with surroundings |
| 17. | captain | person in charge of boat |
| 18. | channel | narrow water passage |
| 19. | chop | short rough surface waves |
| 20. | clownfish | small orange reef fish |
| 21. | coral | hard marine colony structure |
| 22. | cove | small sheltered bay |
| 23. | cramp | painful muscle tightening |
| 24. | current | moving water flow |
| 25. | defog | prevent lens misting |
| 26. | dehydration | too little body water |
| 27. | depth | distance below the surface |
| 28. | dive | go underwater briefly |
| 29. | dolphin | intelligent marine mammal |
| 30. | drift | move with the current |
| 31. | drop-off | sudden underwater depth change |
| 32. | dry bag | waterproof bag for belongings |
| 33. | duck dive | surface dive headfirst downward |
| 34. | ear squeeze | ear pain from pressure change |
| 35. | eel | long snake-like fish |
| 36. | encounter | meeting wildlife unexpectedly |
| 37. | entry | way of getting into water |
| 38. | equalize | balance pressure in ears |
| 39. | exit | way of leaving water |
| 40. | fatigue | extreme tiredness |
| 41. | fins | footwear for efficient kicking |
| 42. | flag | visible marker for safety |
| 43. | float | stay on the water |
| 44. | flutter kick | alternating up-and-down fin kick |
| 45. | foot pocket | part of fin for foot |
| 46. | free dive | dive while holding breath |
| 47. | frog kick | wide kick like a frog |
| 48. | glide | move smoothly through water |
| 49. | goggles | eye coverings for swimming |
| 50. | grouper | large heavy-bodied reef fish |
| 51. | guide | person leading the outing |
| 52. | habitat | natural home of an organism |
| 53. | hover | stay nearly still underwater |
| 54. | hypothermia | dangerously low body temperature |
| 55. | jellyfish | gelatinous stinging sea animal |
| 56. | kelp | large brown seaweed |
| 57. | kick | propel yourself with your legs |
| 58. | ladder | steps for climbing aboard |
| 59. | lagoon | shallow coastal water area |
| 60. | lens | clear viewing part of mask |
| 61. | manatee | large gentle marine mammal |
| 62. | mask | face covering for underwater vision |
| 63. | mooring | secured boat attachment point |
| 64. | moray | large reef-dwelling eel |
| 65. | mouthpiece | part held between the teeth |
| 66. | nudibranch | colorful shell-less sea slug |
| 67. | observe | watch carefully |
| 68. | octopus | eight-armed marine animal |
| 69. | parrotfish | reef fish with beaklike mouth |
| 70. | plankton | tiny drifting water organisms |
| 71. | predator | animal that hunts others |
| 72. | pressure | force exerted by water |
| 73. | prey | animal hunted by another |
| 74. | purge | clear water from snorkel |
| 75. | rash guard | protective swim shirt |
| 76. | ray | flat gliding sea fish |
| 77. | reef | ridge of coral or rock |
| 78. | resurface | come back to surface |
| 79. | rip current | strong current away from shore |
| 80. | seagrass | marine flowering plants underwater |
| 81. | seal | watertight fit around edges |
| 82. | shark | cartilaginous predatory fish |
| 83. | shore | land beside the water |
| 84. | skirt | soft mask edge seal |
| 85. | snapper | common schooling reef fish |
| 86. | snorkel | breathing tube used at surface |
| 87. | squid | fast swimming tentacled animal |
| 88. | strap | band that secures gear |
| 89. | surface | top of the water |
| 90. | tide | regular rise and fall |
| 91. | tow float | floating marker pulled behind |
| 92. | tread | stay upright by moving limbs |
| 93. | turtle | marine reptile with shell |
| 94. | undertow | seaward pull beneath waves |
| 95. | urchin | spiny round sea animal |
| 96. | venomous | able to inject venom |
| 97. | vest | inflatable flotation garment |
| 98. | visibility | how clearly you can see |
| 99. | wetsuit | insulating neoprene suit |
| 100. | whistle | small device for signaling |