Ten tetra species compared through real photographs of body shapes and colour patterns. An editorial selection, not a danger ranking. Attribution: 1. File:Neonsalmler Paracheirodon innesi.jpg; Holger Krisp; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Neonsalmler_Paracheirodon_innesi.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 2. File:Cardinal Paracheirodon axelrodi (3).jpg; CHUCAO; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Cardinal_Paracheirodon_axelrodi_(3).jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 3. File:Black-Neon-Tetra.jpg; Atulbhats; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Black-Neon-Tetra.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 4. File:Hyphessobrycon amandae A.jpg; Klaus Rudloff; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Hyphessobrycon_amandae_A.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 5. File:Hyphessobrycon pulchripinnis.jpg; Waugsberg; CC BY 2.5; https://creativecommons.org/licenses/by/2.5; https://commons.wikimedia.org/wiki/File:Hyphessobrycon_pulchripinnis.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 6. File:Serpae tetra.JPG; No machine-readable author provided. Faucon~commonswiki assumed (based on copyright claims).; CC BY-SA 2.5; https://creativecommons.org/licenses/by-sa/2.5; https://commons.wikimedia.org/wiki/File:Serpae_tetra.JPG; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 7. File:Gymnocorymbus ternetzi.JPG; emptyvi; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Gymnocorymbus_ternetzi.JPG; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 8. File:Kobbertetra Hasemania nana.jpg; Malene Thyssen (User Malene ); CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Kobbertetra_Hasemania_nana.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 9. File:Emperor tetra.jpg; Citron; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Emperor_tetra.jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars. 10. File:Phenacogrammus interruptus (aka).jpg; André Karwath aka Aka; CC BY-SA 2.5; https://creativecommons.org/licenses/by-sa/2.5; https://commons.wikimedia.org/wiki/File:Phenacogrammus_interruptus_(aka).jpg; Uniform scaling without cropping; fitted into 9:16 with title and caption bars.