- most ray-finned fish (except some teleosts). The
caudal fin is
either heterocercal (only
fossil taxa) or diphycercal. The
coelacanth is one type of living...
- flexible. One of the
primary characteristics present in most
sharks is the
heterocercal tail,
which aids in locomotion.
Chondrichthyans have tooth-like scales...
- Polypteriforms).
Additional shared features include spiracles and, in sturgeons, a
heterocercal tail (the
vertebrae extend into the
larger lobe of the
caudal fin). However...
- long-lived, late-maturing
fishes with
distinctive characteristics, such as a
heterocercal caudal fin
similar to
those of sharks, and an elongated, spindle-like...
-
often fan-shaped. The tail may be
heterocercal,
reversed heterocercal, protocercal, diphycercal, or homocercal.
Heterocercal:
vertebrae extend into the upper...
-
ctenoid scales Endoskeleton Cartilaginous Mostly bony
Caudal fin
Heterocercal Heterocercal or
diphycercal Pelvic fins
Usually posterior.
Mostly anterior...
-
which provide the main
source of
thrust for the shark. Most
sharks have
heterocercal caudal fins,
meaning that the
backbone extends into the (usually longer)...
- for new territories.
Named for
their exceptionally long, thresher-like
heterocercal tail or
caudal fins (which can be as long as the
total body length),...
- length. It has been
referred to as a
freshwater shark because of its
heterocercal tail or
caudal fin
resembling that of sharks,
though it is not closely...
-
below by fins of
similar size. In callorhinchids, the tail is
instead heterocercal, with a
larger upper lobe
inclined upwards,
similar to many sharks. There...
