Sandy shore animals amazing features

Sandy shore animals possess unique features as a result of the harsh, dynamic, and volatile physio-chemical characteristics of sandy shore

1. Faunal Characteristics
ofSandySHOREAnimals
Md.Al Tahsin Mahmud Khan
B.Sc.(Hons)
Department of Oceanography
Faculty of Marine Science
Fisheries
University of Chittagong

2. Sandy shore
•A sandy beach is a land bordering the
sea defined as theaccumulation of soft
sediments laid by waves and tides.
•It is usually consisting of sand, gravel
and made up of locally found tiny
material.
An active beach is divided into three
regions :
•Backshore
•On shore
•Fore shore

3. Animals
found
inSandy
Shore

4. Faunal adaption and
special characteristic
•FaunalAdaptationisthe
process by whichspecies
becomes fitted to
itsenvironment;
•Organisms are adapted
totheirenvironmentsin a
great variety of waysin
order to survive,
reproduce and to get
advantage of
theenvironment
•The characteristicsthat
are developed after
adaption is called special
faunal characteristics

5. Faunal
characteristics
Tidal Migration
Breeding
Adaption
Uniqe Feeding
Behavior
Special
adapterd
organs
Burrowing in
Sand

6. TidalMigration
Sandy shore habitants shows tidal
migration toadapt withthe wave action .
Example-Isopods,Eurydice,Emerita.

7. Burrowing
features

8. Feeding Behavior
Since there is no flora in this
ecosystem , consumers are mostly
filter feeders, wreck feeders and
depositfeeders.
Type of feeders:
➢Wreck Feeders
➢Filter or suspension feeders
➢Deposit feeders
➢Detrius feeders

9. Wreck Feeders
Wreck is the term used for surf grass,sea-
weeddebris found in the shore.40% of
marineinvertebrates found in sandy shore are
wreck feeders.
Ex: Beach hoppers,roly polies, kelp flies, rover
beatles

10. Wreck
feederanimals

11. Filter Feeders
Filter feederspulled in the
water which containsnutrients
in through one of their syphons
and into theirgills. The cilia in
the gills is able totrap tiny food
particle
From the water and move them
down to their mouth.Then the
water is pushed through other
syphons.
Sand dollar, heart clam, Sand
crab, Sand dollar, Sea star,
bean clam, pismo clam.

12. Filter-Feeder
Animals

13. Deposit Feeders
SomeSand dwellers are adapted to feed on thedeposit of the beach. The
deposit isconsistingof sand,organic matter are made up the remains of
deadorganisms.
For example,Pectinariabuilds a delicate tusk like tubeand into the burrow, it
excavates a conical depressionand feeds on the particle slips into the
depression , bypicking them with tentacles.
Arenicola is another deposit feeder.

14. Deposit-Feeders

15. Detritus Feeder
Detritus, a thin layer of ooze which coats the surface ofsandy beach after the
tide has gone out. It is consisted ofbacteria, remains of algae and decaying
fragments ofdead animals and diatoms.
Many types of marine and intertidal groups are adaptedto feed on it.
•Crabs use mandibles to nibble off thedetritus
•Semaphore crabs has feeding claws shaped likespoons
to shovel up thedetritus.
•The sandbubblerscarves out grooves in the sand ,quickly shifting the out
thedetritusparticle with itshighly adapted mouth parts.

16. Detritus
Feeders

17. Adapted Organs
(Siphon)
While buried in thesand, aninalmust have
amechanismfor respiration.
Many species have specialized breathing tube or
siphonused to pump water into the body, where it
passes overthe gills so that the animal can obtain
Oxygen,plankton

18. Flat Shape of
Bivalve
To resist dislodgement by wave, many animal
havestreamlined orflat body shape. The smooth
shell ofolive snails allows it to reduce wave
resistance .

19. It means one of the pair of legs of
crab or decapods that bear claw.
Crab use it for burrowing in sand,
cutting food, avoid predation,
attacking prey, avoid being
washed away
Chelipeds of Crab

20. Breeding Adaption
(Turtles)
Therearemanyothertruemarineanimalswhichvisit
theintertidalsandsmainlyforbreeding.Ex:kingcrabs,
thegrunionandthesea-turtles
Thefemalecrabexcavatesaholeinthesand
depositstheeggswhicharesoonfertilizedbythemales.
Femalturtlesexcavatepitsinthesand,bury
theirleathery-shelledeggsthereandthenreturnto
thesea.
Theyoungafterhatchingcrawldownandswimoff.
Theseeggsaresooncoveredwithsandby
theactionofwaves.

21. The grunion,tenuis of the
Californiacoast, visits theintertidal
sandy shore forbreeding.
Breeding migration depends on
lunar cycle and
so that the developed eggs maybe
washed back into the sea by the
next springtide.