Scientific Name
Hippocampus semispinosus
Common Name
Half-spined seahorse
Biology
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 18;
Anal
spines: 0;
Anal
soft rays: 4. Trunk rings 11; tail rings 35-36; subdorsal spines 3/0,1,0-0.5, usually enlarged on 11th trunk ring; nose ridge with straight profile and no spine; spine above eye small, length less than eye diameter, angled back; lateral head spine large, about twice in size of eye-spine and recurving; small spine behind eye, placed high above eye center; coronet well developed, with 5-7 diverging blunt spines with rugose tips, posterior spines enlarged and recurving; upper shoulder-ring spine long, situated at gill opening; lower shoulder-ring spine moderately large, with a poorly developed second spine anteriorly; superior trunk and tail ridges with rugose tubercles, enlarged on 1st and 7th rings as broad spines; superior tail ridge with spines of moderate length from 2nd to about 15th ring, somewhat enlarged on 5th and 8th ring, becoming gradually shorter posteriorly; lateral line with pores i