Table 7. Number of species of cnidarians, mollusks, crustaceans, echinoderms, and fish per kilometer of coast and per South American subregion.

Subregion	Taxonomic group	Number of species by taxonomic group	% of total species	Species/100 km of coast
Tropical East Pacific	Fish	1212	18.1	23.8
Coastal length: 5100 km	Crustaceans	863	12.9	16.9
Total species: 6714	Mollusks	875	13.0	17.2
	Echinoderms	223	3.3	4.4
	Cnidarians	110	1.6	2.2
	TOTAL	3283	48.9
Humboldt Current system	Fish	1167	11.4	16.0
Coastal length: 7280 km	Crustaceans	3136	30.7	43.1
Total species: 10201	Mollusks	1203	11.8	16.5
	Echinoderms	364	3.6	5.0
	Cnidarians	517	5.1	7.1
	TOTAL	6387	62.6
Patagonian Shelf	Fish	539	14.3	9.5
Coastal length: 5649 km	Crustaceans	611	16.2	10.8
Total species: 3776	Mollusks	849	22.5	15.0
	Echinoderms	207	5.5	3.7
	Cnidarians	258	6.8	4.6
	TOTAL	2464	65.3
Brazilian Shelf	Fish	1294	14.2	17.3
Coastal length: 7491 km	Crustaceans	1966	21.6	26.2
Total species: 9103	Mollusks	1833	20.1	24.5
	Echinoderms	254	2.8	3.4
	Cnidarians	535	5.9	7.1
	TOTAL	5882	64.6
Tropical West Atlantic	Fish	889	32.4	47.4
Coastal length: 1877 km	Crustaceans	519	18.9	27.7
Total species: 2743	Mollusks	431	15.7	23.0
	Echinoderms	107	3.9	5.7
	Cnidarians	131	4.8	7.0
	TOTAL	2077	75.7