Examples of how different fish swim in different Steffensen-type swim tunnels:
Fast escape response of Atlantic cod (Gadus morhua) - filmed at 250 frames per second with Fastec Imaging High Resolution Camera - a total of 275 frames (animated gif file) (Foto: J. F. Steffensen). Light is flickering due to different frequencies - 50Hz vs. 250 Hz.
Picasso fish slowly swimming with stiff body. Fish fast swimming with paired fins AND tail.
Filmed at the Sesoko Biosphere Laboratory, Japan. Further information. (Foto: J. F. Steffensen).
Parrot fish slowly swimming with stiff body. Filmed at the Sesoko Biosphere Laboratory, Japan. Further information. (Foto: J. F. Steffensen).
Yellow Tail Surgeon fish slowly swimming with stiff body - filmed at Sesoko Biosphere Lab, Japan (Foto: J. F. Steffensen).
Japanese mackerel (Scomber japonicus) - experiment at Scripps with Bob Schadwick (Foto: J. F. Steffensen).
Filmed at the Sesoko Biosphere lab, Japan (Foto: J. F. Steffensen).
European eel (Anguilla anguilla) swimming at MBL - 25 fps (Foto: J. F. Steffensen).
Sea Bass (Dicentrachus labrax)
Self propelled toy fish - swimming like a box fish with a rigid body (Patent with description of construction)
Pile perch (Rhacochilus vacca) swimming in a Steffensen Type I swimtunnel during FishSwimming course at UW Friday Harbor Labs 2015
How does a coral reef fish deal with the ever changing direction and water velocity on a reef with large waves? - biddirectional swim tunnel design and video by Keith Korsmeyer
Ref: Marcoux, T. M. and K. E. Korsmeyer (2019). "Energetics and behavior of coral reef fishes during oscillatory swimming in a simulated wave surge." J Exp Biol 222(Pt 4): jeb.191791. https://doi.org/10.1242/jeb.191791
Banded knifefish Gymnotus carapo swimming AND air breathing at different swimming speed in a modified Steffensen Mk. I-type swimming respirometer. Video by Dr. Dave McKenzie.
Example of a Steffensen Swim Tunnel Mk. III - Prototype:
AutoCad drawing of Steffensen swimtunnel Mk. III.
Video from "Atlantic Bluefin Tuna Project w IFREMER" with a few swimming sequences of tuna. 5 min and in French
https://vimeo.com/787590263/4731615c97
Updated January 2023.