Evolution has got as far as basic jet engines; see the octopus for an example.
Interestingly, this page provides some interesting data; it seems that a squid’s jet is significantly less energy-efficient than a fish’s tail for propulsion. This implies that that’s perhaps why we see so little jet propulsion in the oceans...
Evolution has got as far as basic jet engines; see the octopus for an example.
Interestingly, this page provides some interesting data; it seems that a squid’s jet is significantly less energy-efficient than a fish’s tail for propulsion. This implies that that’s perhaps why we see so little jet propulsion in the oceans...