Miscellaneous Crustaceans

Cladocerans
Various Cladocerans ( not quite microscopic )
Daphnia

Look very closely, and you may see swarms of Daphnia ( right ) swimming jerkily through the water as they feed on microscopic algae. These tiny "water fleas", are an important link in the food chain, converting plant plankton into animal.

Daphnia

Tadpole shrimps ( left ) grow much larger than daphnia, up to 1 inch. They are capable of swimming but are usually found crawling on the bottom, on plants, or burrowing. Their eggs are highly resistant to drying, which makes Tadpole shrimps well-adapted to life in temporary pools.

Tadpole shrimps

Freshwater shrimps are similar to their saltwater cousins and are usually small ( 1-2" ) and transparent.


Seasickness is the bane of all scuba divers. Here are a number of preventatives:

Chinese Medicine - pressure points in the wrist that are supposed to relieve the effects of seasickness. I don't believe it.

Dramamine - to be effective, this must be taken the night before, as well as again in the morning. It is not effective on all people, and some actually get worse. There is no harm in doubling the dose if you are very worried.