Banded Rudderfish

Rudderfish

Seriola zonata

Size
to 24"

Habitat
Coastal surface waters, congregating around any floating objects

Description
Juveniles ( shown, up to 12" ) are attractively patterned with six or seven dark bars; these are lost in adults, which are also much slimmer. Schools of small Rudderfish can often be found around boats, and even around divers hanging on the anchor line. Pilotfish are similar, but larger and retain dark bars throughout life.

Rudderfish
Herb Segars Photography

paddlewheel

The paddlewheel predates even the steam engine. Horse-driven paddlewheel ferries have been in use for hundreds of years. Compared to screw-type propellers, the design and construction of a paddlewheel is much simpler, and therefore they remained the dominant method of propulsion through the mid-1800s, with some examples remaining in use until after World War II.