Get to know every creature in your aquarium

Detailed care information for fish, shrimp and plant species. Updated every day with hobbyists' measurements, notes and price reports.

Fish Shrimp & snails Plants Beginners Shrimp-safe Plan my aquarium →

1,324species pages

0hobbyist notes

0community tanks

0water tests

Species of the day · October 17, 2026

Cryptocoryne Parva

Cryptocoryne parva

The smallest species of the crypt genus: its narrow, bright green leaves mostly stay at 5–8 cm in the aquarium. It spreads very slowly to form a low lawn in the foreground; it needs more light than other crypts.

Plant Medium 20–28°C pH 6–7.5

Read the care guide

For beginners

View all →

Fish Easy

Added to the catalog this week 1,324 species

View all →

Invertebrate Easy Saltwater

Emerald Crab

Mithraculus sculptus

24–27°C 5 cm long min. 60 L

Fish Medium

Emerald Dwarf Rasbora

Danio erythromicron

20–24°C 2.5 cm long min. 40 L

Fish Easy

Emerald Cory

Brochis splendens

22–28°C 8 cm long min. 100 L

Fish Easy

Emerald Betta

Betta smaragdina

24–28°C 6.5 cm long min. 40 L

Browse by group

Full catalog →