Green Finger Sponge

About this species

Iotrochota birotulata, commonly known as the green finger sponge, is a species of sea sponge in the family Iotrochotidae. It is found in shallow waters in the Caribbean Sea.

Text from the Wikipedia article “Iotrochota birotulata”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 74 records
February: 102 records
March: 87 records
April: 99 records
May: 170 records
June: 74 records
July: 92 records
August: 96 records
September: 182 records
October: 92 records
November: 146 records
December: 141 records

Depth and water temperature

Depth

Mostly recorded at 6–54 m · Deepest record: 1,899.1 m

0–10 m: 31 records
10–20 m: 108 records
20–30 m: 4 records
30–40 m: 20 records
40–50 m: 20 records
50–60 m: 32 records
60–70 m: 1 records
70–80 m: 6 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 1 records

Water temperature

Recorded in surface water of 14–29 °C

12–14 °C: 3 records
14–16 °C: 28 records
16–18 °C: 16 records
18–20 °C: 1 records
20–22 °C: 282 records
22–24 °C: 8 records
24–26 °C: 55 records
26–28 °C: 108 records
28–30 °C: 90 records

Photos

(c) Dan Schofield, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Jay Brasher, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Robin White, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Jay Brasher, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Addshore, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Pauline Walsh Jacobson, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Pauline Walsh Jacobson, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Green Finger Sponge, Purple Bleeding Sponge

Names in 1 more languages

French: Éponge-corde noire et verte

Other scientific names: Halichondria birotulata, Hyrtios musciformis, Iotrochota bistylata

Similar species

Purple-staining sponge
Iotrochota baculifera
Iodine Finger Sponge
Iotrochota purpurea
Iotrochota acerata
Iotrochota coccinea
Iotrochota protea
Amphiastrella kirkpatricki

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
Conservation status as published by GBIF (IUCN Red List).
1,535 open-data records from 1927 to 2024.
Species data updated November 3, 2026.