*2.1. Carotenoids of L. helicina*

The carotenoid content and composition of the small herbivorous sea snail *L. helicina* are shown in Table 1. The total carotenoid content of *L. helicina* was 21.0 ΐg/g wet weight. Ά-Carotene (32.2%), zeaxanthin (24.2%), diatoxanthin (11.1%), and Ά-

cryptoxanthin (10.4%) were found to be major carotenoids. Characteristic algal carotenoids, fucoxanthin (5.2%) and diadinoxanthin (2.4%), were also found. 

## *2.2. Carotenoids of C. limacinea*

The carotenoid content and composition of the sea angel *C. limacina* are shown in Table 1. The total carotenoid content of *C. limacina* was 47.0 ΐg/g wet weight. Fifteen carotenoids were identified. Ά-Carotene (27.6%), Ά-cryptoxanthin (13.5%), and echinenone (9.2%) were found to be major components. Monoacetylenic carotenoids, such as diatoxanthin, 7,8-didehydroastaxanthin, pectenolone, pectenol A, pectenol B, and 4ȝ-hydroxypectenolone, comprised 25.9% of the total carotenoids. Diacetylenic carotenoids, such as alloxanthin, 7,8,7<sup>ȝ</sup>,8<sup>ȝ</sup>-tetradehydroastaxanthin, 4-ketoalloxanthin, and 4ȝ-hydroxy-4-ketoalloxanthin, comprised 13.3% of the total carotenoids. 
