Ocean Sunfish

Ocean Sunfish

Mola mola

Size:
to 10 ft long, 11 ft tall, 4400 lbs,
but usually 4-5 ft long

Habitat:
Open ocean, usually basking near surface. This giant, slow-moving creature flaps along at the surface, propelled by its oar-like dorsal and anal fins and steering with the stump of its tail.

Notes:
Ocean Sunfish are not as rare as you might expect. I have sighted them numerous times from the boat, and once had the pleasure of swimming with a large pair, an encounter that ranks right up there with anything the tropics can offer ( well, almost anything. )

You would think that an animal that flaps around all day and eats jellyfish for a living would not have much need for brains. Yet Sunfish share their Triggerfish cousins' intelligence and curiosity and are drawn to investigate anything unusual, including boats, anchors, buoys, shadows, noises, bubbles, and divers themselves.

Despite their ungainly looks, a sunfish can easily outpace a diver. Their skin and bodies are visibly riddled with parasites, and for this reason, they are inedible.

Ocean Sunfish
Ocean Sunfish
An Ocean Sunfish lazily flapping along on its side.
Note the photographer's shadow for scale.
Ocean Sunfish
This one has obvious propeller scars on the mouth and back.
Ocean Sunfish
A Sunfish circles the inlet buoy off Manasquan.
Ocean Sunfish
Another one swimming deep on the Mohawk.
Herb Segars Photography

aluminum tanks

Scuba tanks are made out of steel or aluminum. Aluminum is cheaper and has somewhat better corrosion resistance, but steel is stronger. The "standard" modern scuba cylinder is the aluminum "80", which actually holds about 77 cubic feet of air at its rated pressure of 3000 psi. This type of tank has probably caught on because for an average-sized person with reasonably good breathing skills, this size is just big enough to cover your allowable no-decompression bottom time and no more. For smaller people, 63 cubic foot aluminum tanks are available, while for larger folks there are choices as big as 120 cuft.