No common name

Aglantha digitale

ORDER Trachymedusa

FAMILY

Rhopalonematidae TAXONOMY

Medusa digitale O. F. Müller, 1776, North Atlantic.

OTHER COMMON NAMES French: Méduse doigtier.

PHYSICAL CHARACTERISTICS

Umbrella cylindrical, 0.39-1.5 in (10-40 mm) high, about twice high than wide, with a small conical projection; lateral mesogleal walls thin, subumbrellar muscles strong; peduncle slender, long, conical, almost as long as subumbrellar cavity; manubrium small; mouth with four simple lips; eight long, sausage-shaped gonads, arising from the radial canals near the apex of the subumbrella and hanging freely in subumbrellar cavity; 80 or more solid marginal tentacles with a core of single endodermal chordal cells; eight free statocysts.

DISTRIBUTION

Worldwide distribution in all oceans and entering the Mediterranean. (Specific distribution map not available.)

HABITAT

From surface down to considerable depths, 1,970 ft (600 m). BEHAVIOR

Prolate medusae using the entire bell for jet propulsion; extremely active medusae.

FEEDING ECOLOGY AND DIET Other small planktonic animals.

REPRODUCTIVE BIOLOGY

Dioecious, sex cells released in sea water, direct development.

CONSERVATION STATUS Not listed by the IUCN.

oceans and the Mediterranean. (Specific distribution map not SIGNIFICANCE TO HUMANS

HABITAT

Chiefly near surface, sometimes in great shoals.

BEHAVIOR

Bold and rapid medusa. FEEDING ECOLOGY AND DIET

Very rapacious, feeds on other small planktonic animals and fishes sometimes three times its size.

REPRODUCTIVE BIOLOGY

Dioecious, sex cells released in sea water, direct development.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

Get My Free Ebook


Post a comment