The dream of finding life on an alien Earth-like world is hampered by a number of technical challenges. Not the least of which is that Earth is dwarfed by the size and brightness of the Sun. We might be able to discover evidence of life by studying the molecular spectra of a planet's atmosphere as it passes in front of the star, but those results might be inconclusive. The way to be certain is to observe the planet directly, but that would take a space telescope with a mirror 3–4 times that of Webb.
Enjopy this one-minute video of a largehead hairtail (Trichiurus lepturus), the “liquid metal fish”, also called the “beltfish”. As you can see, it’s a predator, and it’s gone some set of choppers. Its metallic color apparently camouflages it from prey. And look at that dorsal fin!
Some info from Wikipedia (their bolding):
The largehead hairtail (Trichiurus lepturus) or beltfish is a member of the cutlassfish family, Trichiuridae. This common to abundant species is found in tropical and temperate oceans throughout the world. The taxonomy is not fully resolved, and the Atlantic, East Pacific and Northwest Pacific populations are also known as Atlantic cutlassfish, Pacific cutlassfish and Japanese cutlassfish, respectively. This predatory, elongated fish supports major fisheries.
I wish they wouldn’t hold these things so long out of the water, as it makes them suffer. And I hope even more that they didn’t kill it.
How can astronomers pierce through the interstellar fog of the Milky Way – not to study distant objects, but to understand the fog itself? It just takes a little light.