A research on deep water sharks in Tokyo Bay was carried out from October, 2009 to November, 2011. Sharks taken by bottom gill net from the upper part of the mesopelagic zone in Tokyo Bay were 14 genera, 22 species, 116 in number. During this period, shallow water sharks, 4 genera, 4 speciea, 6 in number in Tokyo Bay were also taken by the bottom gill net placed at depth of 50-150 m.

Table 1. A list of sharks taken from the slope of the Tokyo canion

	species	Japanese name	TL (cm), male	TL (cm), female	number of specimens
1	Apristurus macrorhynchus	Herazame	61,64,65,67	60,65,66,66,66,67,67,67,68,69	15
2	Centrophorus acus	Tarozame	47	52	2
3	C. atromarginatus	Aizame	119	130	2
4	C. squamosus	Momijizame		99,135	2
5	C. tessellatus	Genrokuzame		113	1
6	Cephaloscyllium umbratile	Nanukazame	32	42	1
7	Chlamydoselachus anguineus	Labuka	122,128,129,132,135,136	108,128,135,151	10
8	Dalatias licha	Yoroizame	37,37,44,46,55,63	42,47,55,63,67,88,97,151,155	15
9	Deania calcea	Hera-tunozame	33,34,36,69,70,70,71,71,72	37,37,105,108,110,111,112,115,115,120,120	20
10	D. hystricosa	Sagamizame	88,35	34,37	4
11	Etomoptelus molleri	Hiretakafujikujira	25.5	27,37	3
12	Etomoptelus sp 1			35.5	1
13	Etomoptelus sp 2			26	1
14	Etomoptelus sp 3			36.5	1
15	Galeus eastmani	Yamorizame	45	52,55	3
16	Galeus nipponensis	Nihonyamorizame		57	1
17	Heptranchias perlo	Edo-aburazame		62,75,86,93,98,108,113	7
18	Mitsukurina owstoni	Mitsukurina	92,99,100,110,121,127	119,120	8
19	Odontaspis ferox	Owani		122	1
20	Scyliorhinus torazame	Torazame	39,40		3
21	Squalus mitsukurii	Futo-tunozame	66,70	58,66,80,84,90,98,90,105,108,110,110	13
22	Squalus sp.	Hiretaka-tunozame		40.5	1
				total number	116

Chimaera fantasm >50

Table 2. Shallow water fauna of Tokyo Bay

	species	Japanese name	TL (cm), male	TL (cm), female	number of specimens
23	Musterus manazo	Hoshizame	78		1
24	Pristiophorus japonica	Nokogirizame		107,107	2
25	Squatina japonica	Kasuzame	49		1
26	Triakis scyllium	Dochizame		65	1

Ref.

Blainville's Dogfish, Squalus blainville, from Japan, with Notes on S. mitsukurii and S. japonicus. Chetsung Chen, Toru Taniuchi and Yukio Nose. Japanese Journal of Ichthyology Vol. 26, No. 1

Fauna and zoogeography of deep-benthic chondrichthyan fishes around the Japanese Archipelago. Kazuhiro Nakaya and Shigeru Shira. Ichthyological Research, Vol. 39, No. 1, 37-48

Taxonomy, Comparative anatomy and Phylogeny of Japanese Catsharks, Scyliorhinidae. Kazuhiro Nakaya, Memories of the Faculty of Fisheries Hokkaido University, Vol. 23, No. 1, 1-94

20111227 　