---
title: Little sea isopod in a terrarium | Glass Jar Garden
description: Little sea isopod (Cubaris murina): A small tropical roller, slow to breed. Shreds litter quietly. Needs eats litter 1.5 mg/day each, eats mould 0.2 mg/day...
url: https://glassjar.garden/guide/critters/cubaris-murina/
---

Critters

# Little sea isopod
Cubaris murina

Closed jar only · Grazes plants

A small tropical roller, slow to breed. Shreds litter quietly.

## What the simulation uses

- Eats litter: 1.5 mg/day each (Dead leaves one animal shreds a day, turning them back into soil.)

- Eats mould: 0.2 mg/day each (Mould one animal grazes a day, keeping fuzz and grey mould down.)

- Colony at most: 400 per m² (How many the floor can feed when food is plentiful; less food, fewer.)

- Starving loses: 2 % a day (How fast a colony thins when the jar cannot feed it.)

- Eats: decaying plant, leaf litter, rotting wood, fungi, frass, animal waste (Foods it lives on; the jar feeds it from whichever of these it has.)

- Humidity: 70 to 95 % RH (Air moisture it needs.)

- Temperature: 21 to 29 °C (Comfortable range; beyond it the colony suffers.)

- Doubles in: 90 days (Time for the colony to double with plenty of food.)

- Lives: 912.5 days (How long one animal lives.)

## Care

- Size: 6 to 11 mm

- Moisture: Moist

## What kills it

- substrate drying
- temps below ~18 C
- stagnant waterlogged substrate

## Description
Growing to about 1 cm, it is a favourite in tropical bioactive setups. It is gentle on plants, so it suits a planted jar. Keep it above about 18 °C, with soil that is damp but not waterlogged.

Also called little sea, Cubaris 'Little Sea'.

Estimated, where sources were thin: breeding (all fields); lifespan_days; temp_c; humidity_rh_pct; diet specifics.

## Sources

- [en.wikipedia.org/wiki/Cubaris_murina](https://en.wikipedia.org/wiki/Cubaris_murina)
- [en.wikipedia.org/wiki/Woodlouse](https://en.wikipedia.org/wiki/Woodlouse)

[Grow it in a jar](https://glassjar.garden/?guide=critters/cubaris-murina)

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