All Fish Orders

58 orders sorted by species count.

#	Order	Families	Species	Class
1	Perciformes	188	15,138
2	Cypriniformes	13	5,400
3	Siluriformes	43	4,487
4	Characiformes	24	2,462
5	Scorpaeniformes	38	2,164
6	Cyprinodontiformes	13	1,530
7	Anguilliformes	27	1,321
8	Pleuronectiformes	12	1,009
9	Gadiformes	11	908
10	Tetraodontiformes	23	754
11	Ophidiiformes	7	702
12	Clupeiformes	8	600
13	Stomiiformes	5	540
14	Carcharhiniformes	13	537	Elasmobranchii
15	Myliobatiformes	12	507	Elasmobranchii
16	Rajiformes	9	505	Elasmobranchii
17	Lophiiformes	19	482
18	Syngnathiformes	10	480
19	Myctophiformes	4	460
20	Aulopiformes	25	440
21	Atheriniformes	11	436
22	Salmoniformes	6	407
23	Osmeriformes	13	405
24	Beloniformes	8	333
25	Chimaeriformes	12	326	Holocephali
26	Lamniformes	21	320	Elasmobranchii
27	Beryciformes	16	308
28	Osteoglossiformes	11	304
29	Gymnotiformes	5	280
30	Squaliformes	9	252	Elasmobranchii
31	Rhinopristiformes	5	182	Elasmobranchii
32	Orectolobiformes	9	164	Elasmobranchii
33	Ceratodontiformes	7	149	Dipneusti
34	Coelacanthiformes	10	146	Coelacanthi
35	Mugiliformes	1	137
36	Synbranchiformes	3	135
37	Acipenseriformes	5	114
38	Amiiformes	9	95
39	Myxiniformes	2	93	Myxini
40	Batrachoidiformes	1	93
41	Elopiformes	6	89
42	Torpediniformes	5	85	Elasmobranchii
43	Gasterosteiformes	7	81
44	Albuliformes	3	73
45	Zeiformes	8	70
46	Heterodontiformes	2	64	Elasmobranchii
47	Gonorynchiformes	5	61
48	Esociformes	3	60
49	Petromyzontiformes	5	57	Petromyzonti
50	Lepisosteiformes	3	57
51	Hexanchiformes	6	52	Elasmobranchii
52	Squatiniformes	2	49	Elasmobranchii
53	Lampriformes	9	44
54	Notacanthiformes	2	41
55	Polypteriformes	1	36
56	Polymixiiformes	3	35
57	Saccopharyngiformes	4	32
58	Pristiophoriformes	1	26	Elasmobranchii

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