These simplest of multicellular animals come in all sizes, colors and shapes including vases, balls, ropes, boring, tubes and barrels.
What are sponges?
100
A diver at depth moves his hand, palm down from side to side.
What is the signal for "level off?"
100
Good divers have this piece of equipment professionally inspected annually or more often if it seems to have a problem.
What is the regulator?
100
This term designates the atmospheric pressure at various depths and the place you are likely to end your diving day.
What are bars?
200
Though easily confused with Blennies, this tiny fish has two dorsal fins rather than one.
What is a Goby?
200
From the class Scyphozoa (sky-fuh-ZO-uh) these translucent, unattached medusae swim in open water and have stinging tentacles that divers try to avoid.
What are jellyfish?
200
A boat is flying a flag with a white rectangle on one end and a blue, notched rectangle on the opposite, outer end.
What is the International Diver Down flag?
200
A waterproof container, mouthpiece, wire/zip ties, various O-rings, a snorkel keeper, silicone grease and quick release buckles.
What is a Save-A-Dive kit?
200
Thermocline
What is an abrupt change from a warmer to a colder layer of water?
300
This fish, marked by numerous white spots on its dark back, "flies" along walls and over sandy areas, stopping to dig in the sand for mollusks, upon which it feeds.
What is an Eagle Ray?
300
Giant, Sun, Elegant, Pale, Hidden and Light Bulb are all types of these solitary polyps that attach to the bottom and paralyze their prey with stinging tentacles.
What are anemones?
300
A diver makes the sign of a capital T with both hands.
What is the signal for "time to turn around" or "half a tank?"
300
*****Daily Double*****
The diver's wetsuit helps protect him from injuries and from this specific term for the serious medical condition in which the body cools so much it can't function normally.
What is hypothermia?
300
25% larger
What is the amount water magnifies objects?
400
Mottled in a wide range of browns with large plumes above the eyes and numerous fleshy flaps on the chin and head, this poisonous master of camouflage often lies motionless on coral reefs.
What is a Spotted Scorpionfish?
400
These coral colonies of numerous, heavy, cylindrical spires grow upward from an encrusting base mass and are light tan to golden brown and chocolate brown.
What is Pillar Coral?
400
A diver extends his arm and holds the fist directly out in front of his chest.
What is the signal for "danger?"
400
The material, working pressure, serial number, dates of all pressure tests and manufacturer or distributor.
What is information generally stamped on a scuba tank?
400
B. W. R. A. F. is a nemonic device that helps PADI instructors teach this important technique.
What is the pre-dive safety check with your buddy? Or What is Begin With Review and Friend.
500
Bucktooth, Bluelip, Greenblotch, Redband, Rainbow, and Queen are all types of these sand-producing reef fish.
What are Parrotfish?
500
This form of black coral grows in long, single, unbranched stalks that often twist and coil, appearing fuzzy and in many shades of yellow, brown, red, green or even chartreuse.
What is Wire Coral?
500
A diver points with two fingers to the open palm of her hand.
What is the signal for "check your air?"
500
Bubbles forming under the outer layer of your high pressure hose.
What indicates a breakdown of the layers of the hose?
500
The atmospheric pressure in PSI at one atmosphere.