Glass bloodfin tetra

Prionobrama filigera

A translucent slender body with red at the tail

The glasslike body and slightly upturned mouth suit an upper-water fish. The pelvic and anal fins lack the red seen in some bloodfin lookalikes.

Adult length: Up to 6 cm (standard length, without the tail fin)
Water temperature: 23–27 °C
pH: 6–7.5

Natural habitat: Native to the Amazon River basin.

Leave open upper-water swimming space and avoid stronger, larger surface-feeding competitors.

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Appearance and identification

Compare the translucent trunk and clear pelvic and anal fins with Aphyocharax anisitsi, whose fins also show red. Mature females can be fuller-bodied. Both sexes have a white anal-fin seam. A male in good condition may show a dark stripe beside it; the white seam alone does not identify a male.