科: Characidae
Balloon Penguin Tetra（Thayeria boehlkei）はカラシン科に分類される淡水魚で、南米に分布する。成魚は約 2.7–4 cm、適水温 22–28 °C。
Thayeria boehlkei is a Characidae from South America. In the wild it prefers blackwater streams and flooded forest; in the aquarium it stays gentle, slightly skittish when kept too few. Plan on 2.7–4 cm of adult fish at 22–28 °C. In a community tank it pairs well with Other small peaceful tetras and rasboras.
難易度：中級。Gentle, slightly skittish when kept too few。
22–28 °C が目安。急変を避け、Heater for stable tropical warmth。
成魚は約 2.7–4 cm。Middle of the water column。最小 25 L の水槽。
Mid-water omnivore; colour foods keep the red honest。Dark sand and leaf litter上で採餌する性質を活かし、沈む餌も与える。
可能。Gentle, slightly skittish when kept too few。おすすめ：Other small peaceful tetras and rasboras — Form a mixed, calm mid-water mass。Single-species isolation — A lone tetra is a stressed tetraとの混泳は避ける。
南米原産。Blackwater streams and flooded forest、Still to gentle current。
換水・メンテ時はふたを推奨。
繁殖：Egg-scatterer over fine plants; no parental care。Subtle; females fuller-bodied。