Water Bugs

These are all known as "true bugs", as opposed to beetles, flies, ants, etc. Both the larval and adult stages are aquatic, although only the adult stages are shown here. All may be found swimming or clinging to underwater plants and must surface to breathe. All are also strong fliers that are attracted to lights at night and have a painful and poisonous bite. Giant Water Bugs are known to feed on small fishes.

Water Boatman

Water Boatman
Arctocorixia interrupta
to 1"

extremely common


Water Strider

Water Strider
Gerris marginatus
to 1"

Skims along on surface of water. Flies well, but does not dive.



Water Scorpion

Water Scorpion
Ranatra fusca
to 2.5"

Not a true scorpion, but has a very painful bite.




Giant Water Bug

Giant Water Bug
Lethocerus americanus
to 3"




Backswimmer

Backswimmer
Lethocerus americanus
to 1/2"


Adult (right) and immature Frilled Sea Anemones
Adult (right) and immature
Frilled Sea Anemones

Sea anemones are found from the intertidal zone to extreme depths. Some live attached to solid objects, others burrow in sand or construct tubes. They feed primarily on plankton.

Sea anemones feed through a mouth located in the center of its tentacles. Waste is regurgitated through the same opening. The tentacles sting zooplankton or fish that pass too close, and the anemone swallows its prey whole. Most anemones cannot sting humans with any noticeable effect.

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