Table 1 Effects of each chemicalon naididae worm, Chaetogaster diastrophus and the eggs of marine medaka, Oryzias dancena

Treatment chemicals	Treatment dose	Rations (%)
Treatment chemicals	Treatment dose	Infected	Sterilized	Survival of embryos	Hatching	Abnormal
Methylene blue (ppm)	40	23±2.1^a	69±2.4^a	95±3.8^a	93±4.6^a	1.0±0.7^a
	80	24±2.2_b	74±3.4_b	61±3.9_b	90±4.1_b	1.4±0.5_b
	160	25±2.9_c	94±2.8_c	46±3.4_c	84±4.9_c	2.0±0.6_c
Formalin (%)	10	26±2.5^a	77±2.9^a	67±4.0^a	61±5.4^a	2.2±0.9^a
	20	21±2.1_b	81±2.8_b	51±4.1_b	48±5.1_b	3.6±1.1_b
	30	28±2.0_c	98±3.2_c	42±4.8_c	37±5.2_c	4.4±0.8_c
Iodine (%)	10	20±2.8^a	47±3.0^a	96±3.7^a	90±4.9^a	1.1±0.7^a
	30	22±2.9_b	56±3.4_b	63±3.4_b	87±4.5_b	1.5±1.0_b
	60	23±2.2_c	90±3.7_c	47±3.9_c	81±4.6_c	2.3±1.1_c