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Mauve-mouth Ascidian

Herdmania grandis

  • Other invertebrates
  • IUCN: Not evaluated
  • Usual depth5–10 m
  • Water temperature14–27 °C
  • Best monthsMay and June
  • How commonOccasional
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Photo credit: no rights reserved · CC0 1.0 · iNaturalist

About this species

Herdmania grandis is a species of sea-squirt in the family Pyuridae.

Text from the Wikipedia article “Herdmania grandis”, 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: 84 records
  • February: 94 records
  • March: 95 records
  • April: 147 records
  • May: 166 records
  • June: 254 records
  • July: 92 records
  • August: 77 records
  • September: 93 records
  • October: 94 records
  • November: 116 records
  • December: 100 records

Depth and water temperature

Depth

Mostly recorded at 5–10 m · Deepest record: 168.4 m

  • 0–10 m: 138 records
  • 10–20 m: 47 records
  • 20–30 m: 0 records
  • 30–40 m: 1 records
  • 40–50 m: 1 records
  • 50–60 m: 0 records
  • 60–70 m: 0 records
  • 70–80 m: 0 records
  • 80–90 m: 0 records
  • 90–100 m: 1 records
  • 100–110 m: 1 records
  • 110+ m: 1 records

Water temperature

Recorded in surface water of 14–27 °C

  • 12–14 °C: 4 records
  • 14–16 °C: 143 records
  • 16–18 °C: 8 records
  • 18–20 °C: 0 records
  • 20–22 °C: 417 records
  • 22–24 °C: 2 records
  • 24–26 °C: 63 records
  • 26–28 °C: 47 records

Names and classification

English
Mauve-mouth Ascidian, Red-mouthed Ascidian

Other scientific names: Cynthia complanata, Cynthia grandis, Halocynthia grandis, Microcosmus draschi, Microcosmus draschii, Microcosmus julinii, Rhabdocynthia complanata, Rhabdocynthia draschii

Similar species

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).
  • 1,002 open-data records from 1916 to 2025.
  • Species data updated November 3, 2026.

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