Table 2. Biodiversity metrics at each site, for the underwater visual survey (UVS), ichthyocide survey, and the combined dataset from both methods.

Site	Reef	Families	Genera	Species	Density	H’	1-λ	EH
UVS
1	River Island	9	18	24	1.04	2.2	0.83	0.49
2	Dolphin Spout Channel	7	13	16	0.3	2.32	0.87	0.51
3	The Black Hole	9	18	24	1.46	1.78	0.68	0.39
4	Amr's Drop Off	11	23	27	1.28	2.23	0.83	0.49
5	Umm Urumah	13	27	37	3.42	1.6	0.7	0.35
6	Umm Urumah (west)	10	21	26	0.68	2.58	0.88	0.57
7	Tane's Delight	11	23	30	7.44	1.04	0.47	0.23
8	Sea Moth Grotto	17	41	55	3.58	1.98	0.68	0.44
	Al Wajh Total	24	57	92	2.4	2.59	0.86	0.57
Ichthyocide Survey
1	River Island	5	12	14	14	2.17	0.83	0.49
2	Dolphin Spout Channel	4	8	8	4.75	1.91	0.83	0.43
3	The Black Hole	9	21	25	63.5	2.05	0.76	0.47
4	Amr's Drop Off	9	17	19	20.25	2.36	0.85	0.54
5	Umm Urumah	5	12	17	11.75	2.3	0.85	0.52
6	Umm Urumah (west)	9	25	31	33.5	2.68	0.89	0.61
7	Tane's Delight	10	21	23	43.25	1.93	0.73	0.44
8	Sea Moth Grotto	10	20	24	24.25	2.7	0.91	0.61
	Al Wajh Total	20	53	81	26.91	3.36	0.94	0.76
Combined Survey Methods
1	River Island	12	24	33	14.29	2.31	0.84	0.46
2	Dolphin Spout Channel	10	19	22	5.05	2.08	0.84	0.41
3	The Black Hole	15	34	46	64.21	2.11	0.77	0.42
4	Amr's Drop Off	18	37	44	20.29	2.49	0.85	0.49
5	Umm Urumah	16	37	53	14.67	2.62	0.89	0.52
6	Umm Urumah (west)	17	44	55	34.19	2.76	0.89	0.55
7	Tane's Delight	17	37	48	50.19	2.17	0.78	0.43
8	Sea Moth Grotto	21	54	72	26.9	2.9	0.92	0.58
	Al Wajh Total	36	92	153	28.72	3.5	0.95	0.7

Density is in individual fishes per m². H’ = Shannon diversity index. 1-λ = Simpson diversity index. E_H = Shannon’s equitability index.