Amphibia
Shared group label here does not mean identical ecology or locomotion.
Classification
Looks alike is not the same as belongs together.
Taxonomic labels are evidence-backed scientific classifications, while the visual groupings elsewhere in this universe are editorial lenses. Keeping those systems separate prevents a design choice from masquerading as biological taxonomy.
Insecta
Shared group label here does not mean identical ecology or locomotion.
Cephalopoda
Shared group label here does not mean identical ecology or locomotion.
Aves
Peregrine falcon, Emperor penguin
Shared group label here does not mean identical ecology or locomotion.
Mammalia
Shared group label here does not mean identical ecology or locomotion.
Actinopterygii
Shared group label here does not mean identical ecology or locomotion.
Falcon ↔ penguin
Both are birds, but one is built for powered flight and the other uses wing-derived flippers for underwater propulsion. Classification survives the silhouette change.
Otter ↔ octopus
Both use marine environments, but a mammal and a cephalopod arrive there with very different tissues, support systems, limbs, and evolutionary histories. Habitat is not taxonomy.