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You are here:   OldClasses > 2012 > Botryllus leachi | Valerie Chia




Botryllus leachi (Savigny, 1816)
Leach's Sea Daisy 
Valerie Chia (2012)



Fact Sheet



Physical Description


Life History & Behaviour

Anatomy & Physiology

Evolution & Systematics

Biogeographic Distribution

Conservation & Threats

References & Links

Physical Description

(from left to right) Figure 4: Colony of B. leachi attached to a fragment of dead coral. Figure 5: Arrangement of zooids of B. leachi

B. leachi colonies can be found in a variety of colours, ranging from transparent to red, green and yellow (Davie, 2011, NIMPIS, 2012b). B. leachi is a compound ascidian, which means that individual zooids are completely embedded in a soft, fleshy tunic (Carver et al., 2006, Ruppert et al., 2004). Zooids can grow to approximately 5 mm wide in diameter and are arranged in chains and lobes (Figure 4 and 5) (Davie, 2011, NIMPIS, 2012b). The zooids have individual buccal siphons and a shared atrial siphon that opens from a common exhaust chamber called the cloaca (Ruppert et al., 2004). Colonies are sheet like and encrusting, approximately 2 to 3 mm thick, and can grow up to 100 mm or more (Davie, 2011).