Sea Butterflies

Naked Sea Butterfly

Naked Sea Butterflies Clione limacina resemble angels. They have a spindle-shaped body up to 1 inch long that is bluish and transparent, with pink to red-yellow areas. The shell is absent. The head is well developed and clearly evident because of an indentation on the upper part of the body. The body has robust flaps ( mantle lobes ) that are used for propulsion. Although it looks like a jellyfish, the Naked Sea Butterfly is a gastropod mollusk, related to snails and sea slugs, and does not sting.

Naked Sea Butterfly
Naked Sea Butterfly
Naked Sea Butterfly Clione limacina
Atlantic Corolla
Atlantic Corolla - Carolla calceola

The Atlantic Corolla is a swimming snail with a soft, transparent gelatinous body. It looks like a jellyfish but it is not. A truly planktonic opisthobranch that, being negatively buoyant, must swim with its large wing-like foot.

Herb Segars Photography

dive mask
Single-window mask with purge valve

Masks come in hundreds of models and designs. Options include one to six windows, purge valves, color tinting, anti-fog coatings, and whatever else the corporate marketing guys can think up.

A mask's purpose is to let you see in the water. It is surprising just how narrow your field of view in a mask actually is, although you get used to it. Generally, the closer the main windows are to your eyes, the wider your field of view, and this is good. Side windows are supposed to increase your field of view, but they also move the main windows away from your face, and at any rate, you can easily turn your head to get the same effect. A few masks also have bottom windows, which are useful for inspecting yourself or your gauges.

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